| 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} |
| 45 | DF | .~.~ Benzene ring bonded directly to the sulfonate sulfur (e.g., purification and neutralization of benzene sulfonic acids, etc.) {11} |
| 46 | DF | .~.~.~ Having -C(=X)-, wherein X is chalcogen, attached indirectly to the sulfonate group by nonionic bonding (e.g., aldehydes, etc.) {1} |
| 47 | DF | .~.~.~.~ Chalcogen or nitrogen bonded directly to the -C(=X)- group {5} |
| 48 | DF | .~.~.~.~.~ Benzene ring bonded directly to each nitrogen of a -NH-C(=X)-NH-group, wherein X is chalcogen and substitution may be made for hydrogen only {2} |
| 50 |  | .~.~.~.~.~.~ Plural naphthalene ring systems attached indirectly to the -NHC(=X)NH- group by nonionic bonding |