| 528 / | HD | SYNTHETIC RESINS OR NATURAL RUBBERS -- PART OF THE CLASS 520 SERIES |
| * | DD | SYNTHETIC RESINS (Class 520, Subclass 1) {23} |
| 86 | DF | .~ FROM PHENOL, PHENOL ETHER, OR INORGANIC PHENOLATE {15} |
| 171 | DF | .~.~ Sulfur reactant contains sulfur directly bonded to oxygen {3} |
| 174 | DF | .~.~.~ Halogen-containing material is a reactant {1} |
| 175 | | .~.~.~.~ Reactant contains a (O=)S(=O)-halo group |