CLASS 534,	ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES
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SUBCLASSES

7	Noble gas containing (i.e., He, Ne, Ar, Kr, Xe, or Rn containing)
	This subclass is indented under subclass 1.  Compounds under Class 532, ... which contain a noble metal (i.e., helium, neon, argon, krypton, xenon or radon).

10	Radioactive metal containing (At. No. 43, 61 or 84+; or radioactive isotope of another metal)
	This subclass is indented under subclass 1.  Compound under Class 532, ... , which contains a metal which exhibits spontaneous nuclear disintegration with emission of radioactive particles, either as (1) the naturally unstable metal which has as atomic number of (43, 61 or at least 84), or (2) a metal which has been treated to render an isotope thereof radioactive.

11	Actinide series metal (At. No. 89+)
	This subclass is indented under subclass 10.  Compound which contain metals having an atomic number of 89 or higher. (1) Note. Compounds of the transactinide elements, i.e., those having atomic numbers greater than 103 will be found in this group of subclasses.

12	Containing -C(=X)-, wherein X is chalcogen (e.g., carbonyl containing, etc.)
	This subclass is indented under subclass 11.  Compounds which contain a -C(=X)- group, wherein X is chalcogen (i.e., oxygen, sulfur, selenium or tellurium).

13	The -C(=X)- is part of a -C(=X)X- group, wherein the X's are the same or diverse chalcogens
	This subclass is indented under subclass 12.  Compounds in which the -C(=X)- is part of a -C(=X)X- group, wherein the X"s are the same or diverse chalcogens. (1) Note. An example of a compound provided for herein is:

14	Technetium containing (At. No. 43; Tc)
	This subclass is indented under subclass 10.  Compounds which contain technetium.

15	Rare earth containing (At. No. 21, 39, 57-60 or 62-71)
	This subclass is indented under subclass 1.  Compounds under Class 532, ... , which contain a metal having an atomic number of (21, 39, 57 - 60 or 62 - 71).

16	Containing -C(=X)X-, wherein the X's are the same or diverse chalcogens
	This subclass is indented under subclass 15.  Compounds which contain a -C(=X)X- group, wherein the X"s are the same or diverse chalcogens (i.e., oxygen, sulfur, selenium, or tellurium). (1) Note. An example of a compound provided for herein is:

550	Diazoamino (e.g., triazenes, etc.)
	This subclass is indented under subclass 1.  Compounds under Class 532, ... in which nitrogen is attached directly to an acyclic -N=N= group by nonionic bonding, i.e., N-N=N-. (1) Note. Structures in which the entire diazoamino configuration is contained in a ring are classified in the appropriate heterocyclic class. (2) Note. Examples of compounds provided for herein are: SEE OR SEARCH THIS CLASS, SUBCLASS: 551, for those compounds in which the amino nitrogen is part of a ring.

551	Hetero ring containing
	This subclass is indented under subclass 550.  Compounds which contain a hetero ring. (1) Note. The amino nitrogen of the diazoamino group may be a cyclic or an acyclic atom. (2) Note. Examples of compounds provided for herein are:

552	Chalcogen or additional nitrogen bonded directly to the diazoamino group
	This subclass is indented under subclass 550.  Compounds in which chalcogen (i.e., oxygen, sulfur, selenium or tellurium) or additional nitrogen are bonded directly to the diazoamino group. (1) Note. Examples of compounds provided for herein are:

553	Noncarbon atom double or triple bonded and the diazoamino group bonded directly to the same acyclic carbon
	This subclass is indented under subclass 550.  Compounds in which the diazoamino group is bonded directly to an acyclic carbon to which a noncarbon atom is attached directly by a double or triple bond. (1) Note. Examples of compounds provided for herein are:

554	Plural benzene rings bonded directly to the diazoamino group
	This subclass is indented under subclass 550.  Compounds in which at least two benzene rings are bonded directly to the diazoamino group. (1) Note. Examples of compounds provided for herein are:

555	Processes
	This subclass is indented under subclass 550.  Processes for producing, purifying or recovering a compound containing a diazoamino group.

556	Diazooxide or diazotate (e.g., -N=N-O-, etc.)
	This subclass is indented under subclass 1.  Compounds under Class 532, in which oxygen is bonded directly to an acyclic -N=N- or group, which group is attached directly to carbon by nonionic bonding. (1) Note. Among the radicals included herein are: (2) Note. Examples of compounds provided for herein are:

557	Sulfur attached directly to a ring by nonionic bonding
	This subclass is indented under subclass 556.  Compounds in which sulfur is attached directly to a ring by nonionic bonding. (1) Note. Examples of compounds provided for herein are:

558	Diazo or diazonium (e.g., -N=N-C, etc.)
	This subclass is indented under subclass 1.  Compounds under Class 532, ... in which only one nitrogen of a diazo group is bonded directly to carbon; wherein if the remaining nitrogen is bonded to an additional atom or radical, that atom or radical is an anion. (1) Note. Examples of compounds provided for herein are:

559	With preservative or stabilizer
	This subclass is indented under subclass 558.  Products which contain a diazo or diazonium compound in admixture with a preserving or stabilizing agent whose sole function is to prevent physical or chemical change.

560	Hetero ring containing
	This subclass is indented under subclass 558.  Compounds which contain a hetero ring. (1) Note. Examples of compounds provided for herein are:

561	Plural diazo or diazonium groups
	This subclass is indented under subclass 558.  Compounds which contain at least two of the diazo or diazonium groups. (1) Note. An example of a compound provided for herein is:

562	Heavy metal or aluminum containing
	This subclass is indented under subclass 558.  Compounds which include aluminum or metal with a specific gravity greater than four. (1) Note. Arsenic is considered a metal for the purpose of this subclass. (2) Note. Examples of compounds provided for herein are:

563	Polycyclo ring system having at least three cyclos
	This subclass is indented under subclass 558.  Compounds which contain a polycyclo ring system having three or more cyclos. (1) Note. An example of a compound provided for herein is:

564	Aldehyde or ketone group containing
	This subclass is indented under subclass 558.  Compounds which contain an aldehyde or ketone group; i.e., wherein R is hydrogen or carbon.

565	Formation of diazonium group
	This subclass is indented under subclass 558.  Processes of forming the diazonium group.

566	Azoxy
	This subclass is indented under subclass 1.  Compounds under Class 532, ... in which an azoxy group; i.e., - or -NN-, is bonded directly to carbons of two discrete organic radicals. (1) Note. Compounds which contain an azoxy group bonded directly to the same carbon or to two carbons of the same radical thereby forming a heterocyclic ring are classified in the appropriate heterocyclic class. (2) Note. Examples of compounds provided for herein are:

567	Hetero ring containing
	This subclass is indented under subclass 566.  Compounds which contain a hetero ring. (1) Note. An example of a compound provided for herein is:

568	Azodioxy
	This subclass is indented under subclass 566.  Compounds which contain an azodioxy group, i.e., (1) Note. An example of a compound provided for herein is:

569	Heavy metal or aluminum containing
	This subclass is indented under subclass 566.  Compounds which include aluminum or a metal with a specific gravity greater than four. (1) Note. Arsenic is considered a metal for the purpose of this subclass.

570	Sulfonic acid group containing (-(0=)S(=O)-OH, wherein H of -OH may be replaced by a substituted or unsubstituted ammonium ion or metal)
	This subclass is indented under subclass 566.  Compounds which contain a --OH group bonded directly to carbon, wherein -H of the -OH may be replaced by a substituted or unsubstituted ammonium ion or a Group IA or IIA light metal. (1) Note. An example of a compound provided for herein is:

571	Stilbene containing
	This subclass is indented under subclass 570.  Compounds which contain a stilbene group, i.e., as illustrated below, wherein any hydrogen may be replaced. (1) Note. An example of a compound provided for herein is:

572	Formation of azoxy group
	This subclass is indented under subclass 566.  Processes of forming the azoxy group.

573	Azo
	This subclass is indented under subclass 1.  Compounds under Class 532, ... in which an acyclic -N=N- group is bonded directly to carbons of two discrete organic radicals. (1) Note. Compounds which contain a -N=N- group bonded directly to the same carbon or to two carbons of the same radical thereby forming a heterocyclic ring are classified in the appropriate heterocyclic class.

574	Quaternary azo group containing
	This subclass is indented under subclass 573.  Compounds wherein a nitrogen of the azo group is pentavalent (i.e., -NN-), with a bond to an additional carbon and a bond to an anion. (1) Note. An example of a compound provided for herein is:

575	Specified crystalline form
	This subclass is indented under subclass 573.  Compounds which are azo compounds having a specifically disclosed crystalline structure, form or modification.

576	With preservative or stabilizer
	This subclass is indented under subclass 573.  Products which contain an azo compound in admixture with a preserving or stabilizing agent whose sole function is to prevent physical or chemical change.

577	Liquid crystal (e.g., pleochroic, etc.)
	This subclass is indented under subclass 573.  Compounds which are azo dyes existing either in a semi-crystalline form or in a transition state between crystalline solid and normal liquid, i.e., having the appearance of being crystals while having the viscosities to behave mechanically as liquids, and which usually show different colors. (1) Note. These dyes are utilized in display type devices.

578	Formation of azo group by oxidative coupling
	This subclass is indented under subclass 573.  Processes wherein the azo group is formed by oxidative coupling.

579	Formation of azo group by simultaneous diazotization and coupling
	This subclass is indented under subclass 573.  Processes wherein the azo group if formed by simultaneous diazotization and coupling.

580	Formation of azo group from diazoamino group
	This subclass is indented under subclass 573.  Processes whereby the azo group is formed from a diazoamino group.

581	Formation of azo group by coupling diazonium compound with coupling component in presence of an additional organic compound
	This subclass is indented under subclass 573.  Processes wherein the azo group is formed by the coupling of a diazonium compound with a coupling component in the presence of an additional organic compound.

582	Formation of azo group by coupling diazonium compound with coupling component at a specified pH range
	This subclass is indented under subclass 573.  Processes wherein the azo group is formed by the coupling of a diazonium compound with a coupling component at a specified pH range. (1) Note. Included herein are only those processes in which a pH range is specifically disclosed or claimed.

583	Formation of azo group by coupling diazonium compound with coupling component in presence of ammonia, a Group IIA light metal hydroxide or a Group IA or IIA light metal phosphate
	This subclass is indented under subclass 573.  Processes wherein the azo group is formed by the coupling of a diazonium compound with a coupling component in the presence of ammonia, a Group IIA light metal hydroxide, or a Group IA or IIA light metal phosphate.

584	Formation of azo group by coupling diazonium compound with coupling component in other than stoichiometric proportions
	This subclass is indented under subclass 573.  Processes wherein the azo group is formed by the coupling of a diazonium compound with a coupling component in proportions other than stoichiometric.

585	Formation of azo group by reduction of nitro group
	This subclass is indented under subclass 573.  Processes wherein the azo group is formed by the reduction of a nitro group (i.e., -NO2).

586	Formation of azo group from group having nitrogen single bonded to nitrogen
	This subclass is indented under subclass 573.  Processes whereby the azo group is formed from a group having nitrogen singly bonded to nitrogen, e.g., hydrazine group, hydrazone group, etc.

587	Formation of azo group directly from nitrogen containing compound by process other than diazotization and coupling
	This subclass is indented under subclass 573.  Processes wherein the azo group is formed from a nitrogen containing compound by some process other than diazotization and coupling.

588	Process utilizing azo compound as reactant
	This subclass is indented under subclass 573.  Processes whereby an azo compound is utilized as a reactant in the preparation of a different azo compound.

589	Formation of quaternary ammonium or hydrazinium group
	This subclass is indented under subclass 588.  Processes for the preparation of quaternary ammonium or quaternary hydrazinium compounds.

590	Ring formation
	This subclass is indented under subclass 588.  Processes whereby a ring is formed.

591	Formation of -C(=X)HNH group, wherein X is chalcogen (substitution may be made for hydrogen only)
	This subclass is indented under subclass 588.  Processes whereby a [Fig. 1] group is formed, wherein X is chalcogen (i.e., oxygen, sulfur, selenium or tellurium). FIGURE 1

592	Formation of sulfonamide group
	This subclass is indented under subclass 588.  Processes whereby a sulphonamide group is formed (i.e.,

593	Additional reactant containing phosphorus or sulfur
	This subclass is indented under subclass 588.  Processes which utilize a reactant which contains sulfur or phosphorus; said reactant is other than the azo reactant.

594	Sulfonic acid group formed or added to the azo reactant (-(O=) S (=O)-OH, wherein H of -OH may be replaced by a substituted or unsubstituted ammonium ion or metal)
	This subclass is indented under subclass 593.  Processes whereby a -SO3H group is formed or added to the azo reactant producing a sulfonated azo compound (H of the SO3H group may be replaced by a substituted or unsubstituted ammonium ion or a metal).

595	Formation of -C(=X)X- ester group, wherein the X's may be the same or diverse chalcogens
	This subclass is indented under subclass 588.  Processes whereby a --X- ester group is formed, wherein the X"s may be the same or diverse chalcogens (i.e., oxygen, sulfur, selenium or tellurium).

596	Etherification of hydroxy group
	This subclass is indented under subclass 588.  Processes for etherifying hydroxy groups.

597	Replacement of halogen by cyano group
	This subclass is indented under subclass 588.  Processes wherein halogen is replaced by a cyano group.

598	Replacement of halogen by amino nitrogen
	This subclass is indented under subclass 588.  Processes whereby halogen is replaced by an amino nitrogen.

599	Hydrolysis
	This subclass is indented under subclass 588.  Processes wherein azo compounds are reactants in hydrolysis reactions; i.e., decomposition reactions.

600	Reduction of nitro or nitrogen oxide group
	This subclass is indented under subclass 588.  Processes whereby a nitro group or a nitrogen oxide group is reduced.

601	Nitration
	This subclass is indented under subclass 588.  Processes for the nitration of azo compounds.

602	Metallization of the azo reactant in presence of an additional organic compound
	This subclass is indented under subclass 588.  Processes for the preparation of a metallized azo compound by the reaction of an azo compound with a metal or a metallized compound in the presence of an additional organic compound.

603	Quaternary ammonium or hydrazinium attached indirectly to an azo group by nonionic bonding
	This subclass is indented under subclass 573.  Compounds wherein a pentavalent nitrogen having four bonds to carbons or three bonds to carbons and one to an additional nitrogen is attached indirectly to an azo group by nonionic bonding. (1) Note. Examples of compounds provided for herein are:

604	Hetero ring containing
	This subclass is indented under subclass 603.  Compounds which contain a hetero ring. (1) Note. Examples of compounds provided for herein are:

605	The pentavalent nitrogen is a ring member
	This subclass is indented under subclass 604.  Compounds in which the pentavalent nitrogen is a ring member. (1) Note. Examples of compounds provided for herein are:

606	Azo bonded directly to a hetero ring or to a polycyclo ring system having a hetero ring as one of the cyclos
	This subclass is indented under subclass 605.  Compounds wherein an azo group is bonded directly to a hetero ring or to a polycyclo ring system which contains a hetero ring as one of the cyclos. (1) Note. Examples of compounds provided for herein are:

607	The hetero ring contains the pentavalent nitrogen
	This subclass is indented under subclass 606.  Compounds wherein the pentavalent nitrogen is a member of the hetero ring or the polycyclo ring system to which the azo group is directly bonded. (1) Note. Examples of compounds provided for herein are:

608	Plural azo groups in the same azo moiety attached indirectly to each other by nonionic bonding
	This subclass is indented under subclass 607.  Compounds wherein at least two azo groups within the same azo moiety are attached indirectly to each other by nonionic bonding. (1) Note. The term "azo moiety" as used herein is intended to include singularly each of the azo compounds which complex with a heavy metal in the formation of a sandwich-type compound. (2) Note. An example of a compound provided for herein is:

609	Acyclic carbon bonded directly to the azo group
	This subclass is indented under subclass 607.  Compounds in which an acyclic carbon atom is bonded directly to the azo group. (1) Note. An example of a compound provided for herein is:

610	Additional hetero ring or polycyclo ring system having a hetero ring as one of the cyclos bonded directly to the azo group
	This subclass is indented under subclass 607.  Compounds in which an additional hetero ring or a polycyclo ring system having a hetero ring as one of the cyclos is bonded directly to the azo group. (1) Note. Examples of compounds provided for herein are:

611	The hetero ring is one of the cyclos in a polycyclo ring system
	This subclass is indented under subclass 607.  Compounds wherein the hetero ring which contains the pentavalent nitrogen is one of the cyclos in a polycyclo ring system. (1) Note. An example of a compound provided for herein is:

612	Acyclic -C(=X)-, wherein X is chalcogen, attached directly or indirectly to the hetero ring by nonionic bonding
	This subclass is indented under subclass 605.  Compounds wherein an acyclic -- group, in which X is chalcogen (i.e., oxygen, sulfur, selenium or tellurium) is attached directly or indirectly to the hetero ring by nonionic bonding. (1) Note. Examples of compounds provided for herein are:

613	Heavy metal or aluminum containing
	This subclass is indented under subclass 603.  Compounds which include aluminum or a metal with a specific gravity greater than four. (1) Note. Arsenic is considered a metal for the purpose of this subclass. (2) Note. An example of a compound provided for herein is:

614	Plural azo groups attached indirectly to each other by nonionic bonding
	This subclass is indented under subclass 603.  Compounds in which at least two azo groups are attached indirectly to each other by nonionic bonding. (1) Note. An example of a compound provided for herein is:

615	Plural nitrogens bonded directly to the same alkylene chain (e.g., diamino alkylene, etc.)
	This subclass is indented under subclass 603.  Compounds in which at least two nitrogens are bonded directly to the same alkylene chain. (1) Note. An example of a compound provided for herein is:

616	Nitrogen oxide, other than as nitro or nitroso, containing
	This subclass is indented under subclass 573.  Compounds wherein acyclic oxygen is bonded directly to a nitrogen atom which has three bonds to carbons. (1) Note. This subclass includes, e.g., Figs. 1 and 2 below, but excludes nitro and nitroso, i.e., Figs. 3 and 4, respectively. FIGURE 1 FIGURE 2 FIGURE 3. Nitro FIGURE 4. Nitroso (2) Note. Examples of compounds provided for herein are:

617	Fiber- or substrate-reactive azo compound
	This subclass is indented under subclass 573.  Compounds which are azo compounds having a group capable of reacting with a group of a fiber or a substrate to form a nonionic bond, e.g., reacting with a hydroxy group of cellulose or an amino group of a polyamide, etc. (1) Note. Included herein are only those patents which distinctly disclose that an azo compound is "fiber - or substrate-reactive" or that a reaction occurs between a fiber or substrate and an azo dye. (2) Note. An example of a compound provided for herein is:

618	Formazan containing (i.e., HNH-N=CH-N=NH, wherein substitution may be made for hydrogen only)
	This subclass is indented under subclass 617.  Compounds which contain the formazan group, i.e., N-N=-N=N-. (1) Note. An example of a compound provided for herein is:

619	Heavy metal or aluminum containing
	This subclass is indented under subclass 617.  Compounds which include aluminum or a metal with a specific gravity greater than four. (1) Note. Arsenic is considered a metal for the purpose of this subclass. (2) Note. An example of a compound provided for herein is:

620	Halogen attached directly to a hetero ring or to an alicyclic ring by nonionic bonding
	This subclass is indented under subclass 619.  Compounds in which halogen is attached directly to a hetero ring or to an alicyclic ring by nonionic bonding. (1) Note. An example of a compound provided for herein is:

621	Stilbene containing
	This subclass is indented under subclass 620.  Compounds which contain the group in Fig. 1, wherein only hydrogen may be replaced. FIGURE 1 (1) Note. An example of a compound provided for herein is:

622	The hetero ring is six-membered and contains at least two nitrogens
	This subclass is indented under subclass 620.  Compounds in which the hetero ring to which halogen is attached is six-membered and contains at least two ring nitrogens. (1) Note. An example of a compound provided for herein is:

623	Diverse azo moieties bonded to the same metal
	This subclass is indented under subclass 622.  Compounds wherein azo moieties from different and distinct azo compounds are bonded to the same metal. (1) Note. An example of a compound provided for herein is:

624	At least two such hetero rings attached indirectly to each other by nonionic bonding
	This subclass is indented under subclass 622.  Compounds wherein at least two of the six-membered hetero rings having halogen bonded directly thereto are attached indirectly to each other by nonionic bonding. (1) Note. An example of a compound provided for herein is:

625	Plural azo groups in the same azo moiety attached indirectly to each other by nonionic bonding
	This subclass is indented under subclass 622.  Compounds wherein at least two azo groups within the same azo moiety are attached indirectly to each other by nonionic bonding. (1) Note. The term "azo moiety" as used herein is intended to include singularly each of the azo compounds which complex with a heavy metal in the formation of a sandwich-type compound. (2) Note. An example of a compound provided for herein is:

626	Chalcogen or carbon bonded directly to the six-membered hetero ring and is between the hetero ring and the azo group
	This subclass is indented under subclass 622.  Compounds in which carbon or chalcogen (i.e., oxygen, sulfur, selenium or tellurium) is bonded directly to the six-membered hetero ring, which chalcogen or carbon is between the hetero ring and the azo group. (1) Note. An example of a compound provided for herein is:

627	Plural halogens attached directly to the hetero ring by nonionic bonding
	This subclass is indented under subclass 622.  Compounds in which at least two halogens are attached directly to the six-membered hetero ring by nonionic bonding. (1) Note. An example of a compound provided for herein is:

628	Diverse hetero ring containing
	This subclass is indented under subclass 622.  Compounds which contain an additional hetero ring, which ring is other than six-membered having at least two ring nitrogens. (1) Note. An example of a compound provided for herein is:

629	Alkylene, alkenyl or alkenylene bonded directly to sulfonyl or sulfonamide, which sulfonyl or sulfonamide is between a ring and the alkylene, alkenyl or alkenylene
	This subclass is indented under subclass 619.  Compounds wherein an alkylene, alkenyl or alkenylene chain is bonded directly to a sulfonyl group, i.e., Fig. 1, or to a sulfonamide group, i.e., Fig. 2, which sulfonyl or sulfonamide is between the chain and a ring. FIGURE 1 FIGURE 2. (1) Note. An example of a compound provided for herein is:

630	Halogen attached directly to a hetero ring or to an alicyclic ring by nonionic bonding
	This subclass is indented under subclass 617.  Compounds in which halogen is attached directly to a hetero ring or to an alicyclic ring by nonionic bonding. (1) Note. Examples of compounds provided for herein are:

631	Stilbene containing
	This subclass is indented under subclass 630.  Compounds which contain the [Fig. 1] group, wherein only hydrogen may be replaced. FIGURE 1 (1) Note. An example of a compound provided for herein is:

632	The hetero ring is six-membered and contains at least two nitrogens
	This subclass is indented under subclass 630.  Compounds in which the hetero ring to which halogen is attached is six-membered and contains at least two ring nitrogens. (1) Note. An example of a compound provided for herein is:

633	Polycyclo ring system having the hetero ring as one of the cyclos
	This subclass is indented under subclass 632.  Compounds wherein the hetero ring is one of the cyclos in a polycyclo ring system. (1) Note. An example of a compound provided for herein is:

634	At least two such hetero rings attached indirectly to each other by nonionic bonding
	This subclass is indented under subclass 632.  Compounds which contain at least two of the six-membered hetero rings having halogen bonded directly thereto attached indirectly to each other by nonionic bonding. (1) Note. An example of a compound provided for herein is:

635	Additional hetero ring containing
	This subclass is indented under subclass 632.  Compounds which contain an additional hetero ring. (1) Note. An example of a compound provided for herein is:

636	Pyrazole containing (including hydrogenated)
	This subclass is indented under subclass 635.  Compounds wherein the additional hetero ring has the following basic structure, which may contain double bonds between ring members: (1) Note. An example of a compound provided for herein is:

637	Plural azo groups attached indirectly to each other by nonionic bonding
	This subclass is indented under subclass 632.  Compounds in which at least two azo groups are attached indirectly to each other by nonionic bonding. (1) Note. An example of a compound provided for herein is:

638	The hetero ring and benzene ring, to which an azo group is bonded directly, bonded directly to the same nitrogen
	This subclass is indented under subclass 632.  Compounds wherein the hetero ring and a benzene ring are both bonded directly to the same nitrogen, said benzene ring is additionally bonded directly to the azo group. (1) Note. An example of a compound provided for herein is:

639	Aziridine containing (including unsaturated)
	This subclass is indented under subclass 617.  Compounds which contain a hetero ring having the following basic structure, which may contain a double bond between ring members: (1) Note. An example of a compound provided for herein is:

640	Alkylene, alkenyl, alkenylene, alkynyl or alkynylene attached directly or indirectly to a ring by nonionic bonding
	This subclass is indented under subclass 617.  Compounds wherein an alkylene, alkenyl, alkenylene, alkynyl or alkynylene chain is attached directly or indirectly to a ring by nonionic bonding. (1) Note. An example of a compound provided for herein is:

641	Alkylene, alkenyl or alkenylene bonded directly to sulfonyl or sulfonamido, which sulfonyl or sulfonamido is between a ring and the alkylene, alkenyl or alkenylene
	This subclass is indented under subclass 640.  Compounds wherein an alkylene, alkenyl or alkenylene chain is bonded directly to a sulfonyl group, i.e., --, or a sulfonamide group, i.e., --N, which sulfonyl or sulfonamide is between the chain and a ring. (1) Note. An example of a compound provided for herein is:

642	The alkylene, alkenyl or alkenylene and the ring are both bonded directly to the same sulfonyl group
	This subclass is indented under subclass 641.  Compounds wherein the alkylene, alkenyl or alkenylene chain and the ring are both bonded directly to the same sulfonyl group. (1) Note. An example of a compound provided for herein is:

643	Alkylene, alkenyl or alkenylene bonded directly to carboxamido, urea or -C(=X)-, wherein X is chalcogen, which group is between a ring and the alkylene, alkenyl or alkenylene
	This subclass is indented under subclass 640.  Compounds wherein an alkylene, alkenyl or alkenylene chain is bonded directly to a -- group, wherein X is chalcogen (i.e., oxygen, sulfur, selenium or tellurium), to a -C , group or to a N--N group, which group is between the chain and a ring. (1) Note. Examples of compounds provided for herein are:

644	Alkylene, alkenyl or alkenylene and a ring bonded directly to the same chalcogen or to plural chalcogens which are bonded directly to each other
	This subclass is indented under subclass 640.  Compounds in which an alkylene, alkenyl or alkenylene chain and a ring are both bonded directly to the same chalcogen atom (i.e., oxygen, sulfur, selenium or tellurium) or to plural chalcogens which are bonded directly to each other. (1) Note. Examples of compounds provided for herein are:

645	Plural sulfonyl groups bonded directly to same amino nitrogen (e.g., sulfonylaminosulfonyl, etc.)
	This subclass is indented under subclass 573.  Compounds in which at least two sulfonyl groups are bonded directly to the same amino nitrogen, e.g., (1) Note. An example of a compound provide for herein is:

646	Sulfonyl and carbonyl bonded directly to the same amino nitrogen (e.g., sulfonylaminocarbonyl, etc.)
	This subclass is indented under subclass 573.  Compounds in which sulfonyl and carbonyl are both bonded directly to the same amino nitrogen, (1) Note. An example of a compound provided for herein is:

647	Plural amino nitrogens bonded directly to the same sulfonyl (e.g., aminosulfonylamino, etc.)
	This subclass is indented under subclass 573.  Compounds in which at least two amino nitrogens are bonded directly to the same sulfonyl group; e.g.,N--N, etc. (1) Note. An example of a compound provided for herein is:

648	Alkyl, having at least eight carbons specified, or plural alkyl chains, each having at least five carbons specified, bonded directly to a ring, which ring is attached directly or indirectly to an acyclic carbon chain, which chain is bonded directly to a urea or carboxamide nitrogen that is between the chain and an additional ring
	This subclass is indented under subclass 573.  Compounds wherein an alkyl chain, which has at least eight carbons specified, or plural alkyl chains, each of which has at least five carbons specified, is bonded directly to a ring. (1) Note. Examples of compounds provided for herein are:

649	Alkyl chain having at least eight carbons specified bonded directly to a ring
	This subclass is indented under subclass 573.  Compounds wherein an alkyl chain which has at least eight carbons specified is bonded directly to a ring. (1) Note. Examples of compounds provided for herein are:

650	Sulfonyl or -C(=X)-, wherein X is chalcogen, between a ring and an alkyl chain having at least eight carbons specified
	This subclass is indented under subclass 573.  Compounds which contain a group or a -- group, wherein X is chalcogen (i.e., oxygen, sulfur, selenium or tellurium), between a ring and an alkyl chain which has at least eight carbons specified. (1) Note. An example of a compound provided for herein is:

651	The sulfonyl or -C(=X)- is bonded directly to the ring
	This subclass is indented under subclass 650.  Compounds in which the sulfonyl group or the -- group is bonded directly the ring. (1) Note. Examples of compounds provided for herein are:

652	Formazan containing (i.e., HNH-N=CH-N=NH, wherein substitution may be made for hydrogen only)
	This subclass is indented under subclass 573.  Compounds which contain the formazan group, i.e., -N=-N=N-. (1) Note. Examples of compounds provided for herein are:

653	Polycyclo carbocyclic ring system having at least three cyclos
	This subclass is indented under subclass 573.  Compounds which contain a polycyclo carbocyclic ring system having at least three cyclos. (1) Note. Examples of compounds provided for herein are:

654	The polycyclo ring system consists of three six-membered cyclos and has plural oxygens bonded directly thereto
	This subclass is indented under subclass 653.  Compounds in which the polycyclo carbocyclic ring system consists of three six-membered cyclos and has plural oxygens bonded directly to it. (1) Note. Examples of compounds provided for herein are:

655	Hetero ring containing
	This subclass is indented under subclass 654.  Compounds which contain a hetero ring. (1) Note. An example of a compound provided for herein is:

656	At least two such ring systems having plural oxygens bonded directly thereto
	This subclass is indented under subclass 654.  Compounds which contain at least two polycyclo carbocyclic ring systems consisting of three six-membered cyclos, each having plural oxygens bonded directly to it. (1) Note. An example of a compound provided for herein is:

657	The polycyclo ring system has no azo group bonded directly thereto
	This subclass is indented under subclass 653.  Compounds wherein the polycyclo ring system has no direct bond to any azo group. (1) Note. An example of a compound provided for herein is:

658	Chalcogen double bonded directly to the polycyclo ring system
	This subclass is indented under subclass 653.  Compounds in which chalcogen (i.e., oxygen, sulfur, selenium or tellurium) is double bonded directly to the polycyclo ring system. (1) Note. An example of a compound provided for herein is:

659	Bicyclo carbocyclic ring system consisting of a six-membered ring and a five-membered ring (e.g., indane, etc.)
	This subclass is indented under subclass 573.  Compounds which contain a bicyclo carbocyclic ring system consisting of a six-membered ring and a five-membered ring, ( i.e., the structure below) which may contain double bonds between its members. (1) Note. An example of a compound provided for herein is:

660	Hydroxy and carbonyl of -COO- bonded directly to a monocyclic benzene ring (H or hydroxy may be replaced by a substituted or unsubstituted ammonium ion or a metal)
	This subclass is indented under subclass 573.  Compounds in which -OH and the carbon of a --O- group are both bonded directly to the same monocyclic benzene ring, wherein -H of the -OH may be replaced by a substituted or unsubstituted ammonium ion or a metal. (1) Note. Examples of compounds provided for herein are:

661	Heavy metal or aluminum containing
	This subclass is indented under subclass 660.  Compounds which include aluminum or a metal with a specific gravity greater than four. (1) Note. Arsenic is considered a metal for the purpose of this subclass. (2) Note. Examples of compounds provided for herein are:

662	Hetero ring containing
	This subclass is indented under subclass 661.  Compounds which contain a hetero ring. (1) Note. An example of a compound provided for herein is:

663	Plural azo groups in the same azo moiety attached indirectly to each other by nonionic bonding
	This subclass is indented under subclass 661.  Compounds wherein at least two azo groups within the same azo moiety are attached indirectly to each other by nonionic bonding. (1) Note. The term "azo moiety" as used herein is intended to include singularly each of the azo compounds which complex with a heavy metal in the formation of a sandwich-type compound. (2) Note. An example of a compound provided for herein is:

664	Hetero ring containing
	This subclass is indented under subclass 660.  Compounds which contain a hetero ring. (1) Note. An example of a compound provided for herein is:

665	Azo bonded directly to the hetero ring or to a polycyclo ring system which contains the hetero ring as one of the cyclos
	This subclass is indented under subclass 664.  Compounds wherein an azo group is bonded directly to a hetero ring or to a polycyclo ring system which contains a hetero ring as one of the cyclos. (1) Note. An example of a compound provided for herein is:

666	At least three azo groups attached indirectly to each other by nonionic bonding
	This subclass is indented under subclass 660.  Compounds in which at least three azo groups are attached indirectly to each other by nonionic bonding. (1) Note. An example of a compound provided for herein is:

667	Plural monocyclic benzene rings, each having hydroxy and carbonyl of -COO- bonded directly thereto
	This subclass is indented under subclass 666.  Compounds which contain at least two monocyclic benzene rings, each of which has an -OH group and a -COO- group bonded directly to it. (1) Note. An example of a compound provided for herein is:

668	Additional monocyclic benzene ring having plural hydroxy groups, hydroxy and nitrogen, or plural nitrogens bonded directly thereto, wherein the nitrogen is other than as nitro, nitroso or azo
	This subclass is indented under subclass 666.  Compounds which contain an additional monocyclic benzene ring which has either plural hydroxy groups, hydroxy and nitrogen, or plural nitrogens bonded directly to it; wherein the nitrogen is other than as nitro, nitroso or azo. (1) Note. Examples of compounds provided for herein are:

669	Additional -C(=X)-, wherein X is chalcogen
	This subclass is indented under subclass 666.  Compounds which contain an additional -- group, wherein X is chalcogen (i.e., oxygen, sulfur, selenium or tellurium). (1) Note. An example of a compound provided for herein is:

670	Two azo groups attached indirectly to each other by nonionic bonding
	This subclass is indented under subclass 660.  Compounds in which two azo groups are attached indirectly to each other by nonionic bonding. (1) Note. An example of a compound provided for herein is:

671	Sulfonic acid group containing (-(O=)S(=O)-OH, wherein H of -OH may be replaced by a substituted or unsubstituted ammonium ion or metal)
	This subclass is indented under subclass 670.  Compounds which contain a --OH group bonded directly to carbon, wherein H of the -OH may be replaced by a substituted or unsubstituted ammonium ion or a metal. (1) Note. An example of a compound provided for herein is:

672	Plural monocyclic benzene rings, each having hydroxy and carbonyl of -COO- bonded directly thereto
	This subclass is indented under subclass 671.  Compounds which contain at least two monocyclic benzene rings, each of which has an -OH group and a -COO- group bonded directly to it. (1) Note. An example of a compound provided for herein is:

673	Additional -C(=X)-, wherein X is chalcogen
	This subclass is indented under subclass 671.  Compounds which contain an additional -- group, wherein X is chalcogen (i.e., oxygen, sulfur, selenium or tellurium). (1) Note. An example of a compound provided for herein is:

674	Sulfonic acid group containing (-(O=)S(=O)-OH, wherein H of -OH may be replaced by a substituted or unsubstituted ammonium ion or metal)
	This subclass is indented under subclass 660.  Compounds which contain a --OH group bonded directly to carbon, wherein -H of the -OH may be replaced by a substituted or unsubstituted ammonium ion or a metal. (1) Note. An example of a compound provided for herein is:

675	Azo attached indirectly to the monocyclic benzene ring by nonionic bonding
	This subclass is indented under subclass 674.  Compounds in which the azo group is attached indirectly to the monocyclic benzene ring by nonionic bonding. (1) Note. An example of a compound provided for herein is:

676	Plural -HNH groups or -OH and -HNH bonded directly to a monocyclic benzene ring (H of -OH may be replaced by a substituted or unsubstituted ammonium ion or metal)
	This subclass is indented under subclass 573.  Compounds wherein at least two -NH2 groups or a -NH2 group and an -OH group are bonded directly to a monocyclic benzene ring; wherein -H of the -OH may be replaced by a substituted or unsubstituted ammonium ion or a metal. (1) Note. An example of a compound provided for herein is:

677	Plural azo groups in the same azo moiety attached indirectly to each other by nonionic bonding
	This subclass is indented under subclass 676.  Compounds in which at least two azo groups within the same azo moiety are attached indirectly to each other by nonionic bonding. (1) Note. The term "azo moiety" as used herein is intended to include singularly each of the azo compounds which complex with a heavy metal in the formation of a sandwich-type compound. (2) Note. An example of a compound provided for herein is:

678	Sulfonic acid group containing (-(O=)S(=O)-OH, wherein H of -OH may be replaced by a substituted or unsubstituted ammonium ion or metal)
	This subclass is indented under subclass 677.  Compounds which contain a --OH group bonded directly to carbon, wherein -H of the -OH may be replaced by a substituted or unsubstituted ammonium ion or a metal. (1) Note. Examples of compounds provided for herein are:

679	Plural monocyclic benzene rings, each having -OH and -HNH or plural -HNH groups bonded directly thereto
	This subclass is indented under subclass 678.  Compounds which contain at least two of the monocyclic rings, each of which has plural -NH2 groups or a -NH2 group and an -OH group bonded directly to it. (1) Note. An example of a compound provided for herein is:

680	Exactly three azo groups attached indirectly to each other by nonionic bonding
	This subclass is indented under subclass 678.  Compounds in which exactly three azo groups are attached indirectly to each other by nonionic bonding. (1) Note. An example of a compound provided for herein is:

681	Sulfonic acid group containing (-(O=)S(=O)-OH, wherein H of -OH may be replaced by a substituted or unsubstituted ammonium ion or metal)
	This subclass is indented under subclass 676.  Compounds which contain a --OH group bonded directly to carbon wherein H of the -OH may be replaced by a substituted or unsubstituted ammonium ion or a metal. (1) Note. An example of a compound provided for herein is:

682	Plural hydroxy groups or esters thereof bonded directly to a monocyclic benzene ring (H of hydroxy may be replaced by a substituted or unsubstituted ammonium ion or metal)
	This subclass is indented under subclass 573.  Compounds wherein at least two -OH groups or esters thereof are bonded directly to a monocyclic benzene ring; wherein the -H of the -OH may be replaced by a substituted or unsubstituted ammonium ion, a metal or an ester radical. (1) Note. Examples of compound provided for herein are:

683	Azo bonded directly to the benzene ring
	This subclass is indented under subclass 682.  Compounds wherein the benzene ring is bonded directly to an azo group. (1) Note. An example of a compound provided for herein is:

684	Heavy metal or aluminum containing
	This subclass is indented under subclass 683.  Compounds which contain aluminum or a metal with a specific gravity greater than four. (1) Note. Arsenic is considered a metal for the purpose of this subclass. (2) Note. An example of a compound provided for herein is:

685	At least three azo groups attached indirectly to each other by nonionic bonding
	This subclass is indented under subclass 683.  Compounds in which at least two azo groups are attached indirectly to each other by nonionic bonding. (1) Note. An example of a compound provided for herein is:

686	Hetero ring containing
	This subclass is indented under subclass 685.  Compounds which contain a hetero ring. (1) Note. An example of a compound provided for herein is:

687	Plural monocyclic benzene rings, each having plural hydroxy groups or esters thereof bonded directly thereto
	Compounds undersubclass 685 which contain at least two of the monocyclic benzene rings, each of which has plural -OH groups or esters thereof, bonded directly to it. (1) Note. An example of a compound provided for herein is:

688	Two azo groups attached indirectly to each other by nonionic bonding
	This subclass is indented under subclass 683.  Compounds wherein exactly two azo groups are attached indirectly to each other by nonionic bonding. (1) Note. An example of a compound provided for herein is:

689	Stilbene containing
	This subclass is indented under subclass 573.  Compounds which contain the [see Fig. 1] group, wherein only hydrogen may be replaced. FIGURE 1 (1) Note. An example of a compound provided for herein is:

690	Heavy metal or aluminum containing
	This subclass is indented under subclass 689.  Compounds which contain aluminum or a metal with a specific gravity greater than four. (1) Note. Arsenic is considered a metal for the purpose of this subclass. (2) Note. An example of a compound provided for herein is:

691	Hetero ring containing
	This subclass is indented under subclass 689.  Compounds which contain a hetero ring. (1) Note. An example of a compound provided for herein is:

692	Heavy metal or aluminum containing
	This subclass is indented under subclass 573.  Compounds which contain aluminum or a metal with a specific gravity greater than four. (1) Note. Arsenic is considered a metal for the purpose of this subclass.

693	Amine salt
	This subclass is indented under subclass 692.  Compounds which are amine added salts of the metal containing azo compound. (1) Note. Examples of compounds provided for herein is:

694	Arsenic containing
	This subclass is indented under subclass 692.  Compounds which contain arsenic. (1) Note. An example of a compound provided for herein is:

695	Azo moiety and moiety which contains acyclic -CH=N- group bonded to the same metal
	This subclass is indented under subclass 692.  Compouonds wherein a moiety having an azo group and a moiety having an acyclic chain which contains an azomethine group, i.e., -CH=N, are bonded directly to the same metal. (1) Note. An example of a compound provided for herein is:

696	Diverse azo moieties bonded to the same metal
	This subclass is indented under subclass 692.  Compounds wherein azo moieties from different and distinct azo compounds are bonded to the same metal. (1) Note. The term "azo moiety" as used herein is intended to include singularly each of the azo compounds which complex with a heavy metal in the formation of a sandwich-type compound. (2) Note. An example of a compound provided for herein is:

697	Hetero ring containing
	This subclass is indented under subclass 696.  Compounds which contain a hetero ring. (1) Note. An example of a compound provided for herein is:

698	Hetero ring in each azo moiety
	This subclass is indented under subclass 697.  Compounds wherein each of the azo moieties contains a hetero ring. (1) Note. An example of a compound provided for herein is:

699	Plural azo groups in the same azo moiety attached indirectly to each other by nonionic bonding
	This subclass is indented under subclass 696.  Compounds in which at least two azo groups within the same azo moiety are attached indirectly to each other by nonionic bonding. (1) Note. The term "azo moiety" as used herein is intended to include singularly each of the azo compounds which complex with a heavy metal in the formation of a sandwich-type compound. (2) Note. An example of a compound provided for herein is:

700	Azo bonded directly to an acyclic carbon which is bonded directly to two acyclic carbons, each of which is double or triple bonded to an atom
	This subclass is indented under subclass 692.  Compounds in which an azo group is bonded directly to an acyclic carbon, which carbon is additionally bonded directly to two acyclic carbons, each of which is double or triple bonded to an atom. (1) Note. The term "reactive methylene" is used to describe the acyclic carbon to which the azo group and other two carbons are bonded. (2) Note. An example of a compound provided for herein is:

701	Hetero ring containing
	This subclass is indented under subclass 692.  Compounds which contain a hetero ring. (1) Note. Arsenic is considered a metal for the purpose of this subclass. (2) Note. An example of a compound provided for herein is:

702	Polycyclo ring system containing the hetero ring as one of the cyclos
	This subclass is indented under subclass 701.  Compounds wherein the hetero ring is one of the cyclos in a polycyclo ring system. (1) Note. An example of a compound provided for herein is:

703	Azo bonded directly to the polycyclo ring system
	This subclass is indented under subclass 702.  Compounds in which an azo group is bonded directly to the polycyclo ring system. (1) Note. An example of a compound provided for herein is:

704	The azo group is attached indirectly in the same azo moiety to an additional azo group or to an acyclic chain which contains a -CH=N- group by nonionic bonding
	This subclass is indented under subclass 703.  Compounds wherein the azo group is attached indirectly within the same azo moiety by nonionic bonding to either an additional azo group or an acyclic chain which contains a azomethine group; i.e., -CH=N-. (1) Note. The term "azo moiety" as used herein is intended to include singularly each of the azo compounds which complex with a heavy metal in the formation of a sandwich-type compound. (2) Note. An example of a compound provided for herein is:

705	Plural ring nitrogens in the polycyclo ring system
	This subclass is indented under subclass 703.  Compounds wherein the polycyclo ring system contains at least two ring nitrogens. (1) Note. An example of a compound provided for herein is:

706	Quinoline or isoquinoline containing (including hydrogenated)
	This subclass is indented under subclass 703.  Compounds which contain a bicyclo ring system having either of the following structures, which may contain double bonds between ring members: (1) Note. An example of a compound provided for herein is:

707	Azo bonded directly to the hetero ring
	This subclass is indented under subclass 701.  Compounds in which the hetero ring is bonded directly to an azo group. (1) Note. An example of a compound provided for herein is:

708	At least three azo groups in the same azo moiety attached indirectly to each other by nonionic bonding
	This subclass is indented under subclass 707.  Compounds in which at least three azo groups within the same azo moiety are attached indirectly to each other by nonionic bonding. (1) Note. The term "azo moiety" as used herein is intended to include singularly each of the azo compounds which complex with a heavy metal in the formation of a sandwich-type compound. (2) Note. An example of a compound provided for herein is:

709	Two azo groups in the same azo moiety attached indirectly to each other by nonionic bonding
	This subclass is indented under subclass 707.  Compounds in which two azo groups in the same azo moiety are attached indirectly to each other by nonionic bonding. (1) Note. The term "azo moiety" as used herein is intended to include singularly each of the azo compounds which complex with a heavy metal in the formation of a sandwich-type compound. (2) Note. An example of a compound provided for herein is:

710	Pyrazole (including hydrogenated)
	This subclass is indented under subclass 707.  Compounds which contain a hetero ring having the following structure, which may contain double bonds between ring members: (1) Note. An example of a compound provided for herein is:

711	Sulfonyl bonded directly to a ring
	This subclass is indented under subclass 710.  Compounds wherein a sulfonyl group, i.e., --, is bonded directly to a ring. (1) Note. An example of a compound provided for herein is:

712	Additional chalcogen bonded directly to the sulfonyl
	This subclass is indented under subclass 711.  Compounds wherein an additional chalcogen (i.e., oxygen, sulfur, selenium or tellurium) is bonded directly to the sulfonyl group. (1) Note. An example of a compound provided for herein is:

713	Benzene ring containing
	This subclass is indented under subclass 692.  Compounds which contain a benzene ring. (1) Note. An example of a compound provided for herein is:

714	At least three azo groups in the same azo moiety attached indirectly to each other by nonionic bonding
	This subclass is indented under subclass 713.  Compounds in which at least three azo groups within the same azo moiety are attached indirectly to each other by nonionic bonding. (1) Note. The term "azo moiety" as used herein is intended to include singularly each of the azo compounds which complex with a heavy metal in the formation of a sandwich-type compound. (2) Note. An example of a compound provided for herein is:

715	Plural monocyclic benzene rings attached directly to each other by nonionic bonding and are between azo groups
	This subclass is indented under subclass 714.  Compounds wherein between two azo groups are at least two monocyclic benzene rings which are attached directly to each other by nonionic bonding. (1) Note. An example of a compound provided for herein is:

716	Two azo groups in the same azo moiety attached indirectly to each other by nonionic bonding
	This subclass is indented under subclass 713.  Compounds in which two azo groups within the same azo moiety are attached indirectly to each other by nonionic bonding. (1) Note. The term "azo moiety" as used herein is intended to include singularly each of the azo compounds which complex with a heavy metal in the formation of a sandwich-type compound. (2) Note. An example of a compound provided for herein is:

717	Containing -C(=X)-, wherein X is chalcogen (e.g., carbonyl, etc.)
	This subclass is indented under subclass 716.  Compounds which contain a -C- group, wherein X is chalcogen (i.e.,oxygen, sulfur, selenium or tellurium. (1) Note. An example of a compound provided for herein is:

718	Plural monocyclic benzene rings attached directly or indirectly to each other by acyclic nonionic bonding and are between the azo groups
	This subclass is indented under subclass 717.  Compounds where in between the azo groups are at least two monocylcic benzene rings which are attached directly or indirectly to each other by acyclic nonionic bonding. (1) Note. Examples of compounds provided for herein are:

719	Plural monocyclic benzene rings attached directly or indirectly to each other by acyclic nonionic bonding and are between the azo groups
	This subclass is indented under subclass 716.  Compounds wherein between the azo groups are at least two monocyclic benzene rings which are attached directly or indirectly to each other by acyclic nonionic bonding. (1) Note. An example of a compound provided for herein is:

720	Containing -C(=X)-, wherein X is chalcogen (e.g., carbonyl, etc.)
	This subclass is indented under subclass 713.  Compounds which contain a -- group, wherein X is chalcogen (i.e., oxygen, sulfur, selenium, or tellurium). (1) Note. An example of a comound provided for herein is:

721	Nitrogen bonded directly to the -C(=X)- group (e.g., carboxamide, etc.)
	This subclass is indented under subclass 720.  Compounds wherein nitrogen is bonded directly to the -- group; i.e., --N. (1) Note. An example of a compound provided for herein is:

722	Plural bicyclo carbocyclic ring systems bonded directly to the azo group
	This subclass is indented under subclass 713.  Compounds wherein plural bicyclo carbocyclic ring systems are bonded directly to the azo group. (1) Note. An example of a compound provided for herein is:

723	Sulfonyl bonded directly to amino nitrogen (e.g., sulfonamide, etc.)
	This subclass is indented under subclass 713.  Compounds in which amino nitrogen is bonded directly to a sulfonyl group; i.e., N . (1) Note. An example of a compound provided for herein is:

724	Sulfonic acid group containing (-(O=)S(=O)-OH, wherein H of -OH may be replaced by the ammonium ion or a metal)
	This subclass is indented under subclass 713.  Compounds which contain a --OH group bonded directly to carbon, wherein H of the -OH may be replaced by theammonium ion or a metal. (1) Note. An example of a compound provided for herein is:

725	Amino nitrogen containing
	This subclass is indented under subclass 724.  Compounds which contain an amino nitrogen. (1) Note. An example of a compound provided for herein is:

726	Boron or silicon containing
	This subclass is indented under subclass 573.  Compounds which contain boron or silicon. (1) Note. An example of a compound provided for herein is:

727	Phosphorus attached indirectly to an azo group by nonionic bonding
	This subclass is indented under subclass 573.  Compounds wherein phosphorus is attached indirectly to an azo group by nonionic bonding. (1) Note. Examples of compounds provided for herein are:

728	Amine salt
	This subclass is indented under subclass 573.  Compounds which are amine addition salts of an azo compound. (1) Note. An example of a compound provided for herein is:

729	Chain containing at least fifteen alkylene oxide groups
	This subclass is indented under subclass 573.  Compounds which contain a chain composed of a least fifteen alkylene oxide groups. (1) Note. An example of a compound provided for herein is:

730	Sulfonic acid ester group containing
	This subclass is indented under subclass 573.  Compounds which contain a sulfonic acid ester radical; i.e., ---O-- . (1) Note. An example of a compound provided for herein is:

731	Hetero ring containing
	This subclass is indented under subclass 730.  Compounds which contain a hetero ring. (1) Note. An example of a compound provided for herein is:

732	Nitrogen, other than as azo, and chalcogen or -C(=X)X- bonded directly to a -C(=X)- group, wherein the X's may be the same or diverse chalcogens (e.g., carbamic, allophanic, etc.)
	This subclass is indented under subclass 573.  Compounds wherein nitrogen, other than as azo, and chalcogen (i.e., oxygen, sulfur, selenium or tellurium) or nitrogen, other than as azo, and --X, wherein the X"s may be the same or diverse chalcogens, are bonded directly to the same -- group; e.g., -N--O-, -N---O-, etc. (1) Note. An example of a compound provided for herein is:

733	Hetero ring containing
	This subclass is indented under subclass 732.  Compounds which contain a hetero ring. (1) Note. An example of a compound provided for herein is:

734	Halogen bonded directly to sulfur or to a -C(=X)- group, wherein X is chalcogen
	This subclass is indented under subclass 573.  Compounds wherein halogen is bonded directly to sulfur or to a -- group, wherein X is chalcogen, (i.e., oxygen, sulfur, selenium or tellurium); e.g., -S-halo, --halo, etc. (1) Note. Examples of compounds provided for herein are:

735	Containing acyclic -XCN or -NCX, wherein X is chalcogen (e.g., thiocyanato, isocyanato, etc.)
	This subclass is indented under subclass 573.  Compounds which contain an acyclic -XCN or -NCX group, wherein X is chalcogen (i.e., oxygen, sulfur, selenium or tellurium). (1) Note. Examples of compounds provided for herein are:

736	Thiosulfuric acid group containing (-S-(O=)S(=O)-OH, wherein H of the -OH may be replaced by the ammonium ion or Group IA or IIA light metal)
	This subclass is indented under subclass 573.  Compounds which contain a -S--OH group bonded directly to carbon, wherein H of the -OH may be replaced by the ammonium ion or a Group IA or IIA light metal. (1) Note. An example of a compound provided for herein is:

737	Cyano and carbon bonded directly to acyclic nitrogen
	This subclass is indented under subclass 573.  Compounds in which carbon and a cyano group are both bonded directly to the same acyclic nitrogen atom, i.e., ---C=N. (1) Note. Examples of compounds provided for herein are:

738	Acyclic chain which contains -CH=N- (substitution may be made for hydrogen only)
	This subclass is indented under subclass 573.  Compounds in which an acyclic chain contains a -CH=N group, wherein substitution may be made for hydrogen only. (1) Note. Examples of compounds provided for herein are:

739	Azo bonded directly to an acylic carbon which is bonded directly to two acyclic carbons, each of which is double or triple bonded to an atom
	This subclass is indented under subclass 573.  Compounds in which an azo group is bonded directly to an acyclic carbon, which carbon is additionally bonded directly to two acyclic carbons, each of which is double or triple bonded to an atom. (1) Note. The term "reactive methylene" is used in reference to the acyclic carbon to which azo group and other two carbons are bonded. (2) Note. An example of a compound provided for herein is:

740	Hetero ring or polycyclo ring system which contains a hetero ring as one of the cyclos bonded directly to an azo group
	This subclass is indented under subclass 739.  Compounds in which a hetero ring or a polycyclo ring system which contains a hetero ring as one of the cyclos is bonded directly to an azo group. (1) Note. Examples of compounds provided for herein are:

741	Hetero ring attached indirectly to an azo group by nonionic bonding
	This subclass is indented under subclass 739.  Compounds in which a hetero ring is attached indirectly to an azo group by nonionic bonding. (1) Note. An example of a compound provided for herein is:

742	The acyclic carbon, to which the other two acyclic carbons are bonded, is between the hetero ring and the azo group
	This subclass is indented under subclass 741.  Compounds wherein the acyclic carbon, to which the other two cyclic carbons are bonded, is between the hetero ring and the azo group. (1) Note. An example of a compound provided for herein is:

743	At least three azo groups attached indirectly to each other by nonionic bonding
	This subclass is indented under subclass 739.  Compounds in which at least three azo groups are attached indirectly to each other by nonionic bonding. (1) Note. An example of a compound provided for herein is:

744	Two azo groups attached indirectly to each other by nonionic bonding
	This subclass is indented under subclass 739.  Compounds in which exactly two azo groups are attached indirectly to each other by nonionic bonding. (1) Note. An example of a compound provided for herein is:

745	Each azo group is bonded directly to an acyclic carbon which is bonded directly to two acyclic carbons, each of which is double or triple bonded to an atom
	This subclass is indented under subclass 744.  Compounds in which each of the two azo groups is bonded directly to an acyclic carbon, which carbon is additionally bonded directly to two acyclic carbons, each of which is double or triple bonded to an atom. (1) Note. An example of a compound provided for herein is:

746	Plural benzene rings bonded directly to each other and are between the azo groups
	This subclass is indented under subclass 745.  Compounds wherein between the azo groups are at least two benzene rings which are bonded directly to each other. (1) Note. An example of a compound provided for herein is:

747	Each benzene ring is bonded directly to an azo group
	This subclass is indented under subclass 746.  Compounds wherein each of the benzene rings is bonded directly to an azo group. (1) Note. An example of a compound provided for herein is:

748	Plural amino nitrogens bonded directly to a benzene ring which is between the azo groups
	This subclass is indented under subclass 745.  Compounds wherein between the azo groups is a benzene ring to which at least two amino nitrogens are bonded directly. (1) Note. An example of a compound provided for herein is:

749	Sulfonyl bonded directly to nitrogen
	This subclass is indented under subclass 739.  Compounds in which sulfonyl is bonded directly to nitrogen, i.e., --N . (1) Note. An example of a compound provided for herein is:

750	Having -C(=X)-, wherein X is chalcogen, attached indirectly by nonionic bonding to the acyclic carbon to which the other two acyclic carbons are bonded
	This subclass is indented under subclass 739.  Compounds wherein a -C- group, in which X is chalcogen (i.e., oxygen, sulfur, selenium or tellurium), is attached indirectly by nonionic bonding to the acyclic carbon to which the other two acyclic carbons are bonded. (1) Note. An example of a compound provided for herein is:

751	Hetero ring containing
	This subclass is indented under subclass 573.  Compounds which contain a hetero ring. (1) Note. An example of a compound provided for herein is:

752	Polycyclo ring system having a hetero atom shared by at least two rings or at least two hetero atoms which are not members of the same ring
	This subclass is indented under subclass 751.  Compounds which contain a polycyclo ring system having at least two hetero atoms which are not members of the same ring or having a hetero atom which is shared by at least two rings of the polycyclo ring system. (1) Note. Examples of compounds provided for herein are:

753	Azo bonded directly to the hetero ring or to a polycyclo ring system which contains the hetero ring as one of the cyclos
	This subclass is indented under subclass 751.  Compounds in which an azo group is bonded direclty to the hetero ring or to a polycyclo ring system which contains the hetero ring as one of the cyclos.

754	At least three azo groups attached indirectly to each other by nonionic bonding
	This subclass is indented under subclass 753.  Compounds wherein at least three azo groups are attached indirectly to each other by nonionic bonding. (1) Note. An example of a compound provided for herein is:

755	Additional hetero ring or polycyclo ring system which contains a hetero ring as one of the cyclos bonded directly to an azo group
	This subclass is indented under subclass 754.  Compounds in which an additional hetero ring or an additional polycyclo ring system having a hetero ring as one of the cyclos is bonded directly to an azo group. (1) Note. An example of a compound provided for herein is:

756	Two azo groups attached indirectly to each other by nonionic bonding
	This subclass is indented under subclass 753.  Compounds in which two azo groups are attached indirectly to each other by nonionic bonding. (1) Note. An example of a compound provided for herein is:

757	Additional hetero ring or polycyclo ring system which contains a hetero ring as one of the cyclos bonded directly to an azo group
	This subclass is indented under subclass 756.  Compounds in which an additional hetero ring or an additional polycyclo ring system having a hetero ring as one of the cyclos is bonded directly to an azo group. (1) Noted. An example of a compound provided for herein is:

758	Both hetero rings or polycyclo ring systems are between the azo groups
	This subclass is indented under subclass 757.  Compounds wherein between the azo groups are both hetero rings or both polycyclo ring systems. (1) Note. An example of a compound provided for herein is:

759	Plural monocyclic benzene rings, each bonded directly to an azo group, are between the azo groups
	This subclass is indented under subclass 757.  Compounds wherein between the azo groups are plural monocyclic benzene rings, each of which is bonded directly to an azo group. (1) Note. An example of a compound provided for herein is:

760	The benzene rings are bonded directly to each other
	This subclass is indented under subclass 759.  Compounds in which the benzene rings are bonded directly to each other. (1) Note. An example of a compound provided for herein is:

761	Both azo groups are bonded directly to the hetero ring or to the polycyclo ring system
	This subclass is indented under subclass 756.  Compounds in which both azo groups are bonded directly to the same hetero ring or to the same polycyclo ring system. (1) Note. An example of a compound provided for herein is:

762	Polycyclo ring system having at least three cyclos, at least one of which is a hetero ring
	This subclass is indented under subclass 756.  Compounds which contain a polycyclo ring system having at least three cyclos, at least one of which is a hetero ring. (1) Note. An example of a compound provided for herein is:

763	Bicyclo carbocyclic ring system
	This subclass is indented under subclass 756.  Compounds which contain a bicyclo carbocyclic ring system. (1) Note. An example of a compound provided for here is:

764	Additional ring bonded directly to the hetero ring or to the polycyclo ring system
	This subclass is indented under subclass 756.  Compounds in which an additional ring is bonded directly to the hetero ring or to the polycyclo ring system. (1) Note. An example of a compound provided for herein is:

765	Additional hetero ring or polycyclo ring system which contains a hetero ring as one of the cyclos bonded directly to the azo group
	This subclass is indented under subclass 753.  Compounds in which an additional hetero ring or polycyclo ring system having a hetero ring as one of the cyclos is bonded directly to the azo group. (1) Note. An example of a compound provided for herein is:

766	The hetero ring is six-membered and contains nitrogen (e.g., pyridine, etc.)
	This subclass is indented under subclass 765.  Compounds wherein the hetero ring is six-membered and contains nitrogen, e.g., pyridine, morpholine, etc. (1) Note. An example of a compound provided for herein is:

767	The hetero ring contains at least two nitrogens (e.g., pyrimidine, etc.)
	This subclass is indented under subclass 766.  Compounds wherein the hetero ring contains at least two nitrogens, e.g., pyrimidine, triazine, etc. (1) Note. An example of a compound provided for herein is:

768	The hetero ring is in a bicyclo ring system (e.g., quinoline, benzomorpholine, etc.)
	This subclass is indented under subclass 766.  Compounds wherein the hetero ring is one of the cyclos in a bicyclo ring system, e.g., quinoline, benzomorpholine, etc. (1) Note. Examples of compounds provided for herein are:

769	Pyrazole (including hydrogenated)
	This subclass is indented under subclass 765.  Compounds which contain a hetero ring having the following structure, which may contain double bonds between ring members: (1) Note. An example of a compound provided for herein is:

770	The hetero ring is six-membered and consists of one nitrogen and five carbons (e.g., pyridine, etc.)
	This subclass is indented under subclass 753.  Compounds wherein the hetero ring is six-membered and consists of one nitrogen and five carbons, e.g., pyridine, etc. (1) Note. An example of a compound provided for herein is:

771	Acyclic oxygen bonded directly to the hetero ring
	This subclass is indented under subclass 770.  Compounds in which acyclic oxygen is bonded directly to the hetero ring. (1) Note. Examples of compounds provided for herein are:

772	Plural acyclic chalcogens bonded directly to the hetero ring at the two positions adjacent to the ring nitrogen
	This subclass is indented under subclass 771.  Compounds wherein at least two acyclic chalcogens, (i.e., oxygen, sulfur, selenium or tellurium) are bonded directly to the hetero ring at the two positions which are adjacent to the ring in nitrogen. (1) Note. An example of a compound provided for herein is:

773	Plural acyclic nitrogens, other than as nitro, nitroso or azo, bonded directly to the hetero ring at the two positions adjacent to the ring nitrogen
	This subclass is indented under subclass 770.  Compounds wherein at least two acyclic nitrogens are bonded directly to the hetero ring at the two positions which are adjacent to the ring nitrogen; the nitrogens are other than as nitro, nitroso or azo. (1) Note. An example of a compound provided for herein is:

774	Additional hetero ring attached indirectly to the azo group by nonionic bonding
	This subclass is indented under subclass 753.  Compounds in which an additional hetro ring is attached indirectly to the azo group by nonionic bonding. (1) Note. Example of compounds provided for herein are:

775	The additional hetero ring or a polycyclo ring system which contains the additional hetero ring as one of the cyclos is bonded directly to a ring, which ring is between the azo group and the additional hetero ring
	This subclass is indented under subclass 774.  Compounds wherein the additional hetero ring or a polycyclo ring system which contains the additional hetero ring as one of the cyclos is bonded directly to a ring, which ring is between the azo group and the additional hetero ring. (1) Note. Examples of compounds provided for herein are:

776	A ring and the additional hetero ring or a polycyclo ring system which contains the additional hetero ring as one of the cyclos are bonded directly to the same nitrogen
	This subclass is indented under subclass 774.  Compounds wherein a ring and the additional hetero ring or a polycyclo ring system which contains the additional hetero ring as one of the cyclos are both bonded directly to the same nitrogen. (1) Note. An example of a compound provided for herein is:

777	The additional hetero ring or a polycyclo ring system which contains the additional hetero ring as one of the cyclos is bonded directly to an alkylene chain, which chain is between the azo group and the additional hetero ring
	This subclass is indented under subclass 774.  Compounds wherein the additional hetero ring or a polycyclo ring system which contains the hetero ring as one the cyclos is bonded directly to an alkylene chain, which chain is between the azo group and the additional hetero ring. (1) Note. Examples of compounds provided for herein are:

778	Bicyclo carbocyclic ring system bonded directly to the azo group
	This subclass is indented under subclass 753.  Compounds in which a bicyclo carbocyclic ring system is bonded directly to the azo group. (1) Note. An example of a compound provided for herein is:

779	The bicyclo carbocyclic ring system is between the azo group and an additional carbocyclic ring
	This subclass is indented under subclass 778.  Compounds wherein the bicyclo ring system is between the azo group and an additional carbocyclic ring. (1) Note. An example of a compound provided for herein is:

780	Sulfonic acid group containing (-(O=)S(=O)-OH, wherein H of the -OH may be replaced by the ammonium ion or Group IA or IIA light metal)
	This subclass is indented under subclass 778.  Compounds which contain a --OH group bonded directly to carbon, wherein H of the -OH may be replaced by the ammonium ion or a Group IA or IIA light metal. (1) Note. An example of a compound provided for herein is:

781	Sulfonic acid group containing (-(O=)S(=O)-OH, wherein H of the -OH may be replaced by the ammonium ion or a Group IA or IIA light metal)
	This subclass is indented under subclass 753.  Compounds which contain a --OH group bonded directly to carbon wherein H of the -OH may be replaced by the ammonium ion or a Group IA or IIA light metal. (1) Note. An example of a compound provided for herein is:

782	The hetero ring is one of the cyclos in a polycyclo ring system
	This subclass is indented under subclass 781.  Compounds wherein the hetero ring is one of the cyclos of a polycyclo ring system. (1) Note. An example of a compound provided for herein is:

783	Additional sulfonyl containing
	This subclass is indented under subclass 781.  Compounds which contain an additional -- group. (1) Note. An example of a compound provided for herein is:

784	Plural sulfonic acid groups
	This subclass is indented under subclass 783.  Compounds which contain at least two --OH groups bonded directly to carbon. (1) Note. An example of a compound provided herein is:

785	Containing acyclic -C(=X)-, wherein X is chalcogen
	This subclass is indented under subclass 781.  Compounds which contain an acyclic -- group, wherein X is chalcogen (i.e., oxygen, sulfur, selenium or tellurium). (1) Note. An example of a compound provided for herein is:

786	The -C(=X)- is bonded directly to nitrogen
	This subclass is indented under subclass 785.  Compounds in which the -- group is bonded directly to nitrogen, i.e., --N .

787	The hetero ring is one of the cyclos in a polycyclo ring system
	This subclass is indented under subclass 753.  Compounds wherein the hetero ring is one of the cyclos of a polycyclo ring system. (1) Note. An example of a compound provided for herein is:

788	The hetero ring consists of sulfur, nitrogen and carbon (e.g., benzothiazole, etc.)
	This subclass is indented under subclass 787.  Compounds wherein the hetero ring consists of sulfur, nitrogen and carbon, e.g., benzothlazole, etc. (1) Note. An example of a compound provided for herein is:

789	Chalcogen double bonded directly to the hetero ring
	This subclass is indented under subclass 787.  Compounds wherein chalcogen (i.e., oxygen, sulfur, selenium or tellurium) is double bonded directly to the hetero ring.

790	The hetero ring is five-membered and consists of one nitrogen and four carbons (e.g., indole, etc.)
	This subclass is indented under subclass 787.  Compounds wherein heter ring is five-membered and consists of one nitrogen and four carbons; e.g., indole, etc. (1) Note. An example of a compound provided for herein is:

791	Carbocyclic ring bonded directly to the hetero ring or to the polycyclo ring system which contains the hetero ring
	This subclass is indented under subclass 753.  Compounds in which a carbocyclic ring is bonded directly to the hetero ring or to the polycyclo ring system which contains the hetero ring.

792	Pyrazole containing (including hydrogenated)
	This subclass is indented under subclass 791.  Compounds which contain a hetero ring having the following structure, which may contain double bonds between ring members: (1) Note. An example of a compound provided for herein is:

793	Sulfonyl containing
	This subclass is indented under subclass 792.  Compounds which contain a -- group. (1) Note. An example of compound provided for herein is:

794	Carbocyclic ring attached indirectly to the azo group by nonionic bonding
	This subclass is indented under subclass 753.  Compounds wherein a carbocyclic ring is attached indirectly to the azo group by nonionic bonding. (1) Note. An example of a compound provided for herein is:

795	The hetero ring is five-membered and contains at least one atom each of sulfur, nitrogen and carbon
	This subclass is indented under subclass 753.  Compounds in which the hetero ring is five-membered and contains at least one atom each of each of sulfur, nitrogen, and carbon. (1) Note. An example of a compound provided for herein is:

796	At least three azo groups attached indirectly to each other by nonionic bonding
	This subclass is indented under subclass 751.  Compounds in which at least three azo groups are attached indirectly to each other by nonionic bonding. (1) Note. An example of a compound provided for herein is:

797	Two azo groups attached indirectly to each other by nonionic bonding
	This subclass is indented under subclass 751.  Compounds in which two azo groups are attached indirectly to each other by nonionic bonding. (1) Note. An example of a compound provided for herein is:

798	Plural carbocyclic rings bonded directly to the azo group
	This subclass is indented under subclass 751.  Compounds in which plural carbocyclic rings are attached directly to the azo group. (1) Note. An example of a compound provided for herein is:

799	The hetero ring or a polycyclo ring system which contains the hetero ring as one of the cyclos is bonded directly to one of the carbocyclic rings or to a bicyclo ring system which contains the carbocyclic ring as one of the cylcos
	This subclass is indented under subclass 798.  Compounds wherein the hetero ring or a polycyclo ring system which contains the hetero ring as one of the cyclos is bonded directly to one of the carbocyclic rings or to a bicyclo ring system which contains the carbocyclic ring as one of the cyclos. (1) Note. An example of a compound provided for herein is:

800	The hetero ring is one of the cyclos in a polycyclo ring system
	This subclass is indented under subclass 799.  Compounds in which the hetero ring is one of the cyclos in a polycyclo ring system. (1) Note. An example of a compound provided for herein is:

801	The carbocyclic ring or a bicyclo ring system which contains the carbocyclic ring as one of the cyclos and the hetero ring or a polycyclo ring system which contains the hetero ring as one of the cyclos are bonded directly to the same carboxamide group
	This subclass is indented under subclass 798.  Compounds wherein the carbocyclic ring or a bicyclo ring system which contains the carbocyclic ring as one of the cyclos and the hetero ring or a polycyclo ring system which contains the hetero ring as one of the cyclos are both bonded directly to the same carboxamide group. (1) Note. An example of a compound provided for herein is:

802	The carbocyclic ring or a bicyclo ring system which contains the carbocyclic ring as one of the cyclos and the hetero ring or a polycyclo ring system which contains the hetero ring as one of the cyclos are bonded directly to the same nitrogen atom
	This subclass is indented under subclass 798.  Compounds wherein the carbocyclic ring or a bicyclo ring system which contains the carbocyclic ring as one of the cyclos and the hetero ring or a polycyclo ring system which contains the hetero ring as one of the cyclos are bonded directly to the same nitrogen atom. (1) Note. An example of a compound provided for herein is:

803	The hetero ring is six-membered and contains at least two nitrogens
	This subclass is indented under subclass 802.  Compounds in which the hetero ring is six-membered and contains at least two nitrogens. (1) Note. An example of a compound provided for herein is:

804	The hetero ring or a polycyclo ring system which contains the hetero ring as one of the cyclos is bonded directly to an alkylene chain, which chain is between the hetero ring and the carbocyclic ring
	This subclass is indented under subclass 798.  Compounds wherein the hetero ring or a polycyclo ring system which contains the hetero ring as one of the cyclos is bonded directly to an alkylene chain, which chain is between the hetero ring and the carbocyclic ring. (1) Note. An example of a compound provided for herein is:

805	Exactly five or exactly six azo groups attached indirectly to each other by nonionic bonding
	This subclass is indented under subclass 573.  Compounds wherein exactly five or exactly six azo groups are attached indirectly to each other by nonionic bonding.

806	Exactly four azo groups attached indirectly to each other by nonionic bonding
	This subclass is indented under subclass 573.  Compounds in which exactly four azo groups are attached indirectly to each other by nonionic bonding. (1) Note. An example of a compound provided for herein is:

807	Plural nitrogens bonded directly to the same -C(=X)- group, wherein X is chalcogen (e.g., urea, thiourea, etc.)
	This subclass is indented under subclass 806.  Compounds wherein plural nitrogens are bonded directly to the same N-- Ngroup, wherein X is chalcogen (i.e., oxygen, sulfur, selenium or tellurium), e.g., N-- N. (1) Note. An example of a compound provided for herein is:

808	Benzidine containing
	This subclass is indented under subclass 806.  Compounds which contain the group [see Fig. 1], wherein the benzene rings may be further substituted. FIGURE 1. (1) Note. An example of a compound provided for herein is:

809	Exactly three azo groups attached indirectly to each other by nonionic bonding
	This subclass is indented under subclass 573.  Compounds in which exactly three azo groups are attached indirectly to each other by nonionic bonding. (1) Note. An example of a compound provided for herein is:

810	Containing -C(=X)-, wherein X, is chalcogen or nitrogen (e.g., carbonyl, etc.)
	This subclass is indented under subclass 809.  Compounds which contain a -- group, wherein X is nitrogen or chalcogen (i.e., oxygen, sulfur, selenium or tellurium). (1) Note. An example of a compound provided for herein is:

811	Nitrogen single bonded directly to the -C(=X)- group (e.g., carboxamide, guanyl, etc.)
	This subclass is indented under subclass 810.  Compounds wherein the -- is part of a N-- group. (1) Note. An example of a compound provided for herein is:

812	Plural -C(=X)- groups containing
	This subclass is indented under subclass 811.  Compounds which contain at least two of the -- groups. (1) Note. An example of a compound provided for herein is:

813	Benzidine containing
	This subclass is indented under subclass 809.  Compounds which contain the group [see Fig. 1], wherein the benzene rings may be further substituted. FIGURE 1. (1) Note. An example of a compound provided for herein is:

814	Hydroxy and nitrogen, other than as nitro, nitroso or azo, bonded directly to the same bicyclo ring system (H of hydroxy may be replaced by the ammonium ion or a Group IA or IIA light metal)
	This subclass is indented under subclass 813.  Compounds in which both hydroxy and nitrogen are bonded directly to the same bicyclo ring system; wherein the nitrogen is other than as a nitro, nitroso or azo group and the H or hydroxy may be replaced by the ammonium ion or a Group IA or IIA light metal. (1) Note. An example of a compound provided for herein is:

815	Hydroxy bonded directly to a bicyclo ring system (H of hydroxy may be replaced by the ammonium ion or a Group IA or IIA light metal)
	This subclass is indented under subclass 809.  Compounds wherein -OH is bonded directly to a bicyclo ring system, wherein H of the -OH may be replaced by the ammonium ion or a Group IA or IIA light metal. (1) Note. An example of a compound provided for herein is:

816	Exactly two azo groups attached indirectly to each other by nonionic bonding
	This subclass is indented under subclass 573.  Compounds in which exactly two azo groups are attached indirectly to each other by nonionic bonding. (1) Note. An example of a compound provided for herein is:

817	Plural benzene rings bonded directly to the same urea or thiourea group and are between the azo groups
	This subclass is indented under subclass 816.  Compounds wherein between the azo groups are at least two benzene rings which are bonded directly to the same urea or thiourea group. (1) Note. An example of a compound provided for herein is:

818	Bicyclo ring system containing
	This subclass is indented under subclass 817.  Compounds which contain a bicyclo ring system. (1) Note. An example of a compound provided for herein is:

819	Plural benzene rings bonded directly to the same carboxamide or sulfonamide group and are between the azo groups
	This subclass is indented under subclass 816.  Compounds wherein between the azo groups are at least two benzene rings which are bonded directly to the same carboxamide or sulfonamide group. (1) Note. Examples of compounds provided for herein are:

820	Plural carboxamide groups between the azo groups
	This subclass is indented under subclass 819.  Compounds wherein at least two carboxamide groups are between the azo groups. (1) Note. An example of a compound provided for herein is:

821	Plural benzene rings bonded directly to the same chalcogen or -C(=X)- group, wherein X is chalcogen, and are between the azo groups
	This subclass is indented under subclass 816.  Compounds wherein between the azo groups are at least two benzene rings which are bonded directly to the same chalcogen (i.e., oxygen, sulfur,selenium or tellurium) or -- group, wherein X is chalcogen. (1) Note. An example of a compound provided for herein is:

822	Plural benzene rings bonded directly to each other and are between the azo groups
	This subclass is indented under subclass 816.  Compounds wherein between the azo groups are at least two benzene rings which are bonded directly to each other. (1) Note. Examples of compounds provided for herein are:

823	Containing -C(=X)-, wherein X is chalcogen (e.g., carbonyl, etc.)
	This subclass is indented under subclass 822.  Compounds which contain a -- group, wherein X is chalcogen (i.e, oxygen, sulfur, selenium or tellurium). (1) Note. An example of a compound provided for herein is:

824	Nitrogen, other than as nitro, nitroso or azo, attached indirectly to azo by nonionic bonding
	This subclass is indented under subclass 822.  Compounds wherein nitrogen, other than as a nitro, nitroso or azo group, is attached indirectly to azo by nonionic bonding. (1) Note. An example of a compound provided for herein is:

825	Plural nitrogens, other than as nitro, nitroso or azo, attached indirectly to azo by nonionic bonding
	This subclass is indented under subclass 824.  Compounds wherein at least two nitrogens, other than as nitro, nitroso or azo groups, are attached indirectly to azo by nonionic bonding. (1) Note. An example of a compound provided for herein is:

826	Plural sulfonic acid groups bonded directly to the same bicyclo ring system (-(O=)S(=O)-OH, wherein H of the -OH may be replaced by the ammonium ion or a Group IA or IIA light metal)
	This subclass is indented under subclass 825.  Compounds in which at least two --OH groups are bonded directly to the same bicyclo ring system, wherein H of the -OH may be replaced by the ammonium ion or a Group IA or IIA lighty metal. (1) Note. An example of a compound provided for herein is:

827	Hydroxy bonded directly to a bicyclo ring system which is between the azo groups (H of hydroxy may be replaced by a substituted or unsubstituted ammonium ion or a Group IA or IIA light metal)
	This subclass is indented under subclass 816.  Compounds wherein between the azo groups is a bicyclo ring system having -OH bonded directly thereto, wherein H of the -OH may be replaced by a substituted or unsubstituted ammonium ion or a Group IA or IIA light metal. (1) Note. An example of a compound provided for herein is:

828	Plural bicyclo ring systems, each having hydroxy bonded directly thereto
	This subclass is indented under subclass 827.  Compounds which contain at least two bicyclo ring systems, each of which has an -OH group bonded directly thereto. (1) Note. An example of a compound provided for herein is:

829	Containing -C(=X)-, wherein X is chalcogen (e.g., carbonyl, etc.)
	This subclass is indented under subclass 816.  Compounds which contain a -- group, wherein X is chalcogen (i.e., oxygen, sulfur, selenium or tellurium). (1) Note. An example of a compound provide for herein is:

830	Hydroxy and the -C(=X)- are bonded directly to the same bicyclo ring system (H of hydroxy may be replaced by a substituted or unsubstituted ammonium ion or a Group IA or IIA light metal)
	This subclass is indented under subclass 829.  Compounds wherein -OH and the -- group are bonded directly to the same bicyclo ring system; wherein H of the -OH may be replaced by a substituted or unsubstituted ammonium ion or a Group IA or IIA light metal. (1) Note. An example of a compound provided for herein is:

831	Plural benzene rings bonded directly to each azo group
	This subclass is indented under subclass 816.  Compounds in which plural benzene rings are bonded directly to each azo group. (1) Note. An example of a compound provided for herein is:

832	At least one of the benzene rings is part of a bicyclo ring system
	This subclass is indented under subclass 831.  Compounds wherein at least one of the benzene rings is part of a bicyclo ring system. (1) Note. An example of a compound provided for herein is:

833	Each of the benzene rings is part of a bicyclo ring system
	This subclass is indented under subclass 832.  Compounds wherein each of the benzene rings is part of a bicyclo ring system. (1) Note. An example of a compound provided for herein is:

834	Hydroxy bonded directly to the bicyclo ring system (H of hydroxy may be replaced by the ammonium ion or a Group IA or IIA light metal)
	This subclass is indented under subclass 832.  Compounds in which -OH is bonded directly to the bicyclo ring system; wherein H of the -OH may be replaced by the ammonium ion or a Group IA or IIA light metal. (1) Note. An example of a compound provided for herein is:

835	Plural bicyclo ring systems, each having hydroxy bonded directly thereto
	This subclass is indented under subclass 834.  Compounds which contain at least two bicyclo ring systems, each of which has an -OH group bonded directly thereto. (1) Note. An example of a compound provided for herein is:

836	Additional hydroxy or nitrogen, other than as nitro, nitroso or azo, bonded directly to the bicyclo ring system
	This subclass is indented under subclass 834.  Compounds wherein an additional -OH group or nitrogen is bonded directly to the bicyclo ring system, wherein the nitrogen is other than as a nitro, nitroso or azo group. (1) Note. An example of a compound provided for herein is:

837	Sulfonic acid group bonded directly to the bicyclo ring system (-(O=)S(=O) OH, wherein H of the -OH may be replaced by the ammonium ion or a Group IA or IIA light metal)
	This subclass is indented under subclass 834.  Compounds wherein a --OH group is bonded directly to the bicyclo ring system, wherein H of the -OH may be replaced by the ammonium ion or a Group IA or IIA light metal. (1) Note. An example of a compound provided for herein is:

838	Exactly one azo group containing or azo attached indirectly to an additional azo group by ionic bonding
	This subclass is indented under subclass 573.  Compounds which contain exactly one azo group or more than one azo group if their attachment to each other is by ionic bonding. (1) Note. Examples of compounds provided for herein are:

839	Plural benzene rings bonded directly to the azo group
	This subclass is indented under subclass 838.  Compounds wherein plural benzene rings are bonded directly to the azo group. (1) Note. An example of a compound provided for herein is:

840	Each of the benzene rings is part of a bicyclo ring system
	This subclass is indented under subclass 839.  Compounds wherein each of the benzene rings is part of a bicyclo ring system. (1) Note. An example of a compound provided for herein is:

841	Containing -C(=X)-, wherein X is chalcogen (e.g., carbonyl, etc.)
	This subclass is indented under subclass 840.  Compounds which contain a -- group, wherein X is chalcogen (i.e., oxygen, sulfur, selenium or tellurium). (1) Note. An example of a compound provided for herein is:

842	Hydroxy bonded directly at the 2-position of the bicyclo ring system (H of hydroxy may be replaced by the ammonium ion or a Group IA or IIA light metal)
	This subclass is indented under subclass 840.  Compounds wherein -OH is bonded directly at the 2-position of the bicyclo ring system; wherein H of the -OH may be replaced by the ammonium ion or a Group IA or IIA light metal. (1) Note. An example of a compound provided for herein is:

843	Each of the benzene rings is monocyclic
	This subclass is indented under subclass 839.  Compounds in which each of the benzene rings is monocyclic, i.e., neither bridged nor fused. (1) Note. An example of a compound provided for herein is:

844	Sulfonyl containing
	This subclass is indented under subclass 843.  Compounds which contain a -- group. (1) Note. An example of a compoundprovided for herein is:

845	Oxygen bonded directly to the sulfonyl group (e.g., sulfonic acid, etc.)
	This subclass is indented under subclass 844.  Compounds which contain a --O- group. (1) Note. An example of compound provided for herein is:

846	Plural oxygens bonded directly to the sulfonyl group (e.g., sulfuric acid, etc.)
	This subclass is indented under subclass 845.  Compounds which contain a -O--O- group. (1) Note. An example of a compound provided for herein is:

847	The sulfonyl is part of a sulfonamide group (-(O=)S(=O)HNH, wherein substitution may be made for hydrogen only)
	This subclass is indented under subclass 844.  Compounds wherein the sulfonyl is part of a --N group. (1) Note. An example of a compound provided for herein is:

848	Containing -C(=X)-, wherein X is chalcogen
	This subclass is indented under subclass 844.  Compounds which contain a -- group, wherein X is chalcogen (i.e., oxygen, sulfur, selenium or tellurium). (1) Note. An example of a compound provided for herein is:

849	The -C(=X)- is bonded directly to nitrogen, which nitrogen is bonded directly to a ring
	This subclass is indented under subclass 848.  Compounds wherein the X -- group and a ring are both bonded directly to the same nitrogen. (1) Note. An example of a compound provided for herein is:

850	Containing -C(=X)-, wherein X is chalcogen
	This subclass is indented under subclass 843.  Compounds which contain a -- group, wherein X is chalcogen (i.e., oxygen, sulfur, selenium ortellurium). (1) Note. An example of a compound provided for herein is:

851	The -C(=X)- is bonded directly to one of the benezene rings
	This subclass is indented under subclass 843.  Compounds in which the -- group is bonded directly to one of the benzene rings. (1) Note. An example of a compound provided for herein is:

852	The -C(=X)- is in a -C(=X)X- group, wherein the X's may be the same or diverse chalcogens
	This subclass is indented under subclass 850.  Compounds in which the -- is in a --X- group, wherein the X"s may be the same or diverse chalcogens (i.e., oxygen, sulfur, selenium or tellurium). (1) Note. Examples of compounds provided for herein are:

853	The -C(=X)X- is in a -C00H group (H of OH may be replaced by the ammonium ion or a Group IA or IIA light metal)
	This subclass is indented under subclass 852.  Compounds wherein the --X- is in a --OH group, wherein H of the -OH may be replaced by the ammonium ion or a Group IA or IIA light metal. (1) Note. An example of a compound provided for here is:

854	Additional -C(=X)- bonded directly to nitrogen, which nitrogen is bonded directly to a ring
	This subclass is indented under subclass 852.  Compounds which contain an additional -C- group, which group and a ring are bonded directly to the same nitrogen. (1) Note. An example of a compound provided for herein in is:

855	Chalcogen, having no direct bond to a ring, attached directly by a single bond to acyclic carbon
	This subclass is indented under subclass 850.  Compounds wherein chalcogen (i.e., oxygen, sulfur, selenium or tellurium), which has no direct bond to any ring, is attached by a single bond to acyclic carbon. (1) Note. Examples of compounds provided for herein are:

856	Nitrogen, other than as nitro or nitroso, attached indirectly to the azo group by nonionic bonding
	This subclass is indented under subclass 843.  Compounds wherein nitrogen, other than as nitro or nitroso, is attached indirectly to the azo group by nonionic bonding. (1) Note. An example of a compound provided for herein is:

857	Hydroxy bonded directly to acyclic carbon or carbon chain (H of hydroxy may be replaced by the ammonium ion or Group IA or IIA light metal)
	This subclass is indented under subclass 856.  Compounds wherein -OH is bonded directly to an acyclic carbon or carbon chain, wherein H of the -OH may be replaced by the ammonium ion or a Group IA or IIA light metal. (1) Note. An example of a compound provided for herein is:

858	Plural chalcogens bonded directly to the acyclic carbon or carbon chain
	This subclass is indented under subclass 857.  Compounds wherein an additional chalcogen, (i.e., oxygen, sulfur, selenium or tellurium) is bonded directly to the acyclic carbon or carbon chain. (1) Note. Examples of compounds provided for herein are:

859	Chalcogen bonded directly to a ring
	This subclass is indented under subclass 856.  Compounds wherein chalcogen (i.e., oxygen, sulfur, selenium or tellurium) is bonded directly to a ring. (1) Note. An example of a compound provided for herein is:

860	Acyclic -C(=X)- containing, wherein X is chalcogen (e.g., carbonyl, etc.)
	This subclass is indented under subclass 839.  Compounds which contain an acyclic -- group, wherein X is chalcogen (i.e., oxygen, sulfur, selenium or tellurium). (1) Note. An example of a compound provided for herein is:

861	Hydroxy bonded directly to a bicyclo ring system (H of hydroxy may be replaced by a substituted or unsubstituted ammonium ion or a Group IA or IIA light metal)
	This subclass is indented under subclass 860.  Compounds in which an -OH group is bonded directly to a bicyclo ring system, wherein H of the -OH may be replaced by a substituted or unsubstituted ammonium ion or a Group IA or IIA light metal. (1) Note. An example of a compound provided for herein is:

862	Nitrogen bonded directly to the -C(=X)- group (e.g., carboxamide, etc.)
	This subclass is indented under subclass 861.  Compounds in which nitrogen is bonded directly to the -- group, e.g., carboxamide, etc. (1) Note. An example of a compound provided for herein is:

863	The -C(=X)- is bonded directly to the bicyclo ring system
	This subclass is indented under subclass 862.  Compounds in which the

	-- group is bonded directly to the bicyclo ring system. (1) Note. An example of a compound provided for herein is:

864	Sulfonyl containing
	This subclass is indented under subclass 863.  Compounds which contain a -- group. (1) Note. An example of a compound provided for herein is:

865	Additional acyclic -C(=X)- group
	This subclass is indented under subclass 863.  Compounds which contain an additional acyclic -- group, wherein X is chalcogen (i.e., oxygen, sulfur, selenium or tellurium). (1) Note. An example of a compound provided for herein is:

866	Additional nitrogen bonded directly to the additional -C(=X)- group
	This subclass is indented under subclass 865.  Compounds having at least two groups which contain nitrogen bonded directly to --; e.g., N--. (1) Note. An example of a compound provided for herein is:

867	At least three -C(=X)HNH groups, wherein substitution may be made for hydrogen only
	This subclass is indented under subclass 866.  Compounds which contain at least three N-- groups, wherein the X is chalcogen (i.e., oxygen, sulfur, selenium or tellurium). (1) Note. An example of a compound provided for herein is:

868	Additional amino nitrogen
	This subclass is indented under subclass 863.  Compounds which contain an additional amino nitrogen. (1) Note. An example of a compound provided for herein is:

869	Plural oxygens bonded directly to the same monocyclic benzene ring
	This subclass is indented under subclass 863.  Compounds in which at least two oxygens are bonded directly to the same monocyclic benzene ring. (1) Note. An example of a compound provided for herein is:

870	Halogen, acyclic carbon, the azo group and an additional halogen or acyclic carbon, all bonded directly to the same benzene ring
	This subclass is indented under subclass 863.  Compounds wherein bonded directly to the same benzene ring are the azo group, a halogen, an acyclic carbon and either an additional halogen or an additional acyclic carbon. (1) Note. Examples of compounds provided for herein are:

871	Acyclic carbon, carboxamide and chalcogen or an additional acyclic carbon, all bonded directly to the same benzene ring
	This subclass is indented under subclass 863.  Compounds wherein bonded directly to the same benzene ring are an acyclic carbon, a carboxamide group and either chalcogen (i.e., oxygen, sulfur, selenium or tellurium) or an additional acyclic carbon. (1) Note. Examples of compounds provided for herein are:

872	The nitrogen is additionally bonded directly to the bicyclo ring system
	This subclass is indented under subclass 862.  Compounds in which the nitrogen is bonded additionally directly to the bicyclo ring system. (1) Note. An example of a compound provided for herein is:

873	Additional acyclic -C(=X)- group
	This subclass is indented under subclass 872.  Compounds which contain an additional -- group. (1) Note. Examples of a compounds provided for herein are:

874	The -C(=X)- is bonded directly to the bicyclo ring system
	This subclass is indented under subclass 861.  Compounds in which the 878 -- group is bonded directly to the bicyclo ring system. (1) Note. An example of a compound provided for herein is:

875	Nitrogen, other than as nitro or nitroso, attached indirectly to the azo group by nonionic bonding
	This subclass is indented under subclass 839.  Compounds wherein nitrogen, other than as nitro or nitroso, is attached indirectly to the azo group by nonionic bonding. (1) Note. An example of a compound provided for herein is:

876	Oxygen bonded directly to carbon
	This subclass is indented under subclass 875.  Compounds in which oxygen is bonded directly to carbon. (1) Note. An example of a compound provided for herein is:

877	The nitrogen and the oxygen are bonded directly to the same bicyclo ring system
	This subclass is indented under subclass 876.  Compounds in which the nitrogen and the oxygen are both bonded directly to the same bicyclo ring system. (1) Note. An example of a compound provided for herein is:

878	Sulfonyl bonded directly to the bicyclo ring system
	This subclass is indented under subclass 877.  Compounds wherein a -- group is bonded directly to the bicyclo ring system. (1) Note. An example of a compound provided for herein is:

879	Plural sulfonyl groups or plural nitrogens bonded directly to the bicyclo ring system
	This subclass is indented under subclass 878.  Compounds in which at least two nitrogens or at least two -- groups are bonded directly to the bicyclo ring system. (1) Note. An example of a compound provided for herein is:

880	Additional sulfonyl which is attached indirectly to the bicyclo ring system by nonionic bonding
	This subclass is indented under subclass 878.  Compounds which contain an additional -- group, which group is attached indirectly to the bicyclo ring system by nonionic bonding. (1) Note. An example of a compound provided for herein is:

881	Sulfonyl and the nitrogen bonded directly to the same bicyclo ring system
	This subclass is indented under subclass 875.  Compounds wherein the nitrogen and a -- group are both bonded directly to the same bicyclo ring system. (1) Note. An example of a compound provided for herein is:

882	Oxygen double bonded directly to sulfur
	This subclass is indented under subclass 839.  Compounds in which oxygen is double bonded directly to sulfur, e.g., --, etc.. (1) Note. An example of a compound provided for herein is:

883	Sulfonyl bonded directly to a bicyclo ring system
	This subclass is indented under subclass 882.  Compounds in which a -- group is bonded directly to a bicyclo ring system. (1) Note. An example of a compound provided for herein is:

884	Plural sulfonyl groups bonded directly to the same bicyclo ring system
	This subclass is indented under subclass 883.  Compounds wherein at least two -- groups are bonded directly to the same bicyclo ring system. (1) Note. An example of a compound provided for herein is:

885	Benzene ring bonded directly to the azo group
	This subclass is indented under subclass 838.  Compounds in which a benzene ring is bonded directly to the azo group. (1) Note. An example of a compound provided for herein is:

886	Containing -C(=X)-, wherein X is chalcogen (e.g., carbonyl, etc.)
	This subclass is indented under subclass 838.  Compounds which contain a -- group, wherein X is chalcogen (i.e., oxygen, sulfur, selenium or tellurium). (1) Note. An example of a compound provided for herein is:

887	Purification or recovery
	This subclass is indented under subclass 573.  Processes wherein the azo compound is separated from impurities or from the reaction mixture.