| 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} |
| 115 | DF | .~.~ Processes (e.g., neutralization, stabilization, etc.) {6} |
| 120 | DF | .~.~.~ Formation of sulfonic acids or sulfonic acid salts utilizing inorganic sulfonating agents (e.g., reaction of alcohols or alkyl halides with sulfurous acid, etc.) {3} |
| 122 |  | .~.~.~.~ Sulfurous acid or salt thereof reacted with unsaturated hydrocarbon |