| 552 / | HD | ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES |
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| * | DD | ORGANIC COMPOUNDS (Class 532, subclass 1) {11} |
| 101 |  | .~ Acyclic carbon bonded directly to three benzene rings or to two benzene rings and a cyclohexadienyl ring, which acyclic carbon may not be bonded to a fourth carbon (e.g., triphenylmethane dyestuffs, etc.) {12} |
| 102 | DF | .~.~> With preservative or stabilizer |
| 103 | DF | .~.~> Heavy metal or alumium containing |
| 104 | DF | .~.~> Nitrogen, sulfur, phosphorus, or peroxy attached directly to the acyclic carbon by nonionic bonding |
| 105 | DF | .~.~> The acyclic carbon and an additional carbon are bonded directly to the same oxygen (ethers, esters, etc.) |
| 106 | DF | .~.~> One of the rings, or a polycyclo ring system containing one of the rings, is bonded directly to -N=C=O or to -C(=O)OH (wherein H may be replaced by a group IA or IIA light metal, or by substituted or unsubstituted ammonium) {1} |
| 108 | DF | .~.~> One of the rings is part of a polycyclo ring system (e.g., naphthyldiphenylcarbinol, etc.) |
| 109 | DF | .~.~> An acyclic alkylene group is bonded directly to nitrogen and to chalcogen, cyano, carbonyl or additional nitrogen (e.g., N-hydroxyalkyl, N cyanoalkyl, N-sulfatoalkyl, aminoalkylamino groups, etc.) |
| 110 | DF | .~.~> One of the rings and a benzene ring are bonded directly to the same nitrogen (e.g., triphenylrosaniline, etc.) |
| 111 | DF | .~.~> Nitrogen, except as cyano, attached indirectly to a ring by acyclic nonionic bonding (e.g., benzyl rosanilines, etc.) |
| 112 | DF | .~.~> Carbon bonded directly to -S(=O)(=O)OH (wherein H may be replaced by a group IA or IIA light metal, or by substituted or unsubstituted ammonium; i.e., sulfonic acids and salts thereof) |
| 113 | DF | .~.~> Nitrogen bonded directly to one of the rings (e.g., malachite green, rosophenoline, etc.) {1} |
| 115 | DF | .~.~> Chalcogen bonded directly to one of the rings (e.g., fuchsone, etc.) |