| 562 / | HD | ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES |
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| * | DD | ORGANIC COMPOUNDS (Class 532, Subclass 1) {41} |
| 30 | DF | .~ Sulfonic acids or salts thereof (i.e., compounds containing the sulfonate group, -S(=O)(=O)-O- wherein the single bonded oxygen is bonded directly to hydrogen, or to a group IA or IIA light metal or to substituted or unsubstituted ammonium) {15} |
| 41 | DF | .~.~ Benzene ring attached indirectly to the sulfonate group by acyclic nonionic bonding {1} |
| 42 | DF | .~.~.~ Noncarbon atom in acyclic chain between the benzene ring and the sulfonate sulfur {1} |
| 43 |  | .~.~.~.~ Nitrogen in the acyclic chain {1} |
| 44 | DF | .~.~.~.~.~> Chalcogen or -C(=X)-, wherein X is chalcogen, in the chain |