| 556 / | HD | ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES |
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| * | DD | ORGANIC COMPOUNDS (Class 532, Subclass 1) {3} |
| 400 | DF | .~ SILICON CONTAINING {19} |
| 450 |  | .~.~ Two silicons bonded directly to the same oxygen {7} |
| 451 | DF | .~.~.~> Hydrogen bonded directly to silicon |
| 452 | DF | .~.~.~> Halogen bonded directly to silicon |
| 453 | DF | .~.~.~> Three carbons bonded directly to the same silicon {3} |
| 457 | DF | .~.~.~> Silicon and carbon bonded directly to the same oxygen {1} |
| 459 | DF | .~.~.~> Hydroxy bonded directly to silicon (H of hydroxy may be replaced by a substituted or unsubstituted ammonium ion or a Group IA or IIA light metal) may be replaced by a substituted or unsubstituted ammonium ion or a Group |
| 460 | DF | .~.~.~> Ring consisting of silicon and oxygen {1} |
| 462 | DF | .~.~.~> Preparing by utilizing a siloxane reactant |