| 556 / | HD | ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES |
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| * | DD | ORGANIC COMPOUNDS (Class 532, Subclass 1) {3} |
| 400 |  | .~ SILICON CONTAINING {19} |
| 401 | DF | .~.~> With preservative or stabilizer |
| 402 | DF | .~.~> Boron containing {1} |
| 404 | DF | .~.~> Phosphorus attached directly or indirectly to silicon by nonionic bonding {1} |
| 406 | DF | .~.~> Ring consisting of carbon and silicon |
| 407 | DF | .~.~> Nitrogen is ring member {2} |
| 410 | DF | .~.~> Nitrogen attached directly to silicon by nonionic bonding {2} |
| 413 | DF | .~.~> Nitrogen attached indirectly to silicon by nonionic bonding {7} |
| 426 | DF | .~.~> Sulfur bonded directly to silicon |
| 427 | DF | .~.~> Sulfur attached indirectly to silicon by nonionic bonding {2} |
| 430 | DF | .~.~> Plural silicons bonded directly to each other |
| 431 | DF | .~.~> Plural silicons bonded directly to the same carbon or attached by a chain consisting of carbons, which carbons may be part of a ring {3} |
| 436 | DF | .~.~> Carbonyl attached directly or indirectly to silicon by nonionic bonding {1} |
| 443 | DF | .~.~> Plural silicons attached by a chain consisting of oxygen and carbon, which chain may be part of a ring {1} |
| 445 | DF | .~.~> Two carbons bonded directly to the same oxygen {3} |
| 449 | DF | .~.~> Hydroxy bonded directly to carbon or peroxy bonded directly to two carbons or to hydrogen and carbon (H of the hydroxy or the H bonded to the peroxy may be replaced by a substituted or unsubstituted ammonium ion or a Group IA or IIA light metal) |
| 450 | DF | .~.~> Two silicons bonded directly to the same oxygen {7} |
| 463 | DF | .~.~> Hydroxy or peroxy bonded directly to the silicon (H of hydroxy may be replaced by a substituted or unsubstituted ammonium ion or a Group IA or IIA light metal) |
| 464 | DF | .~.~> Ring consisting of silicon, oxygen, and carbon |
| 465 | DF | .~.~> Carbon attached directly or indirectly to the silicon by nonionic bonding (e.g., silanes, etc.) {5} |