| 534 / | HD | ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES |
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| * | DD | ORGANIC COMPOUNDS (CLASS 532, SUBCLASS 1) {8} |
| 573 | DF | .~ Azo {51} |
| 751 | DF | .~.~ Hetero ring containing {5} |
| 753 |  | .~.~.~ Azo bonded directly to the hetero ring or to a polycyclo ring system which contains the hetero ring as one of the cyclos {11} |
| 754 | DF | .~.~.~.~> At least three azo groups attached indirectly to each other by nonionic bonding {1} |
| 756 | DF | .~.~.~.~> Two azo groups attached indirectly to each other by nonionic bonding {5} |
| 765 | DF | .~.~.~.~> Additional hetero ring or polycyclo ring system which contains a hetero ring as one of the cyclos bonded directly to the azo group {2} |
| 770 | DF | .~.~.~.~> The hetero ring is six-membered and consists of one nitrogen and five carbons (e.g., pyridine, etc.) {2} |
| 774 | DF | .~.~.~.~> Additional hetero ring attached indirectly to the azo group by nonionic bonding {3} |
| 778 | DF | .~.~.~.~> Bicyclo carbocyclic ring system bonded directly to the azo group {2} |
| 781 | DF | .~.~.~.~> Sulfonic acid group containing (-(0=)S(=0)-OH, wherein H of the -OH may be replaced by the ammonium ion or a Group IA or IIA light metal) {3} |
| 787 | DF | .~.~.~.~> The hetero ring is one of the cyclos in a polycyclo ring system {3} |
| 791 | DF | .~.~.~.~> Carbocyclic ring bonded directly to the hetero ring or to the polycyclo ring system which contains the hetero ring {1} |
| 794 | DF | .~.~.~.~> Carbocyclic ring attached indirectly to the azo group by nonionic bonding |
| 795 | DF | .~.~.~.~> The hetero ring is five-membered and contains at least one atom each of sulfur, nitrogen and carbon |