| 570 / | HD | ORGANIC COMPOUNDS -- PART OF THE CLASS 532-570 SERIES |
| * | DD | ORGANIC COMPOUNDS (Class 532, Subclass 1) {1} |
| 101 | DF | .~ HALOGEN CONTAINING {21} |
| 216 | DF | .~.~ Processes of preparing, purifying, or recovering unsaturated compound {12} |
| 226 | | .~.~.~ Dehydrohalogenation {2} |
| 227 | DF | .~.~.~.~> Catalyst utilized {1} |
| 229 | DF | .~.~.~.~> Including chemical reaction with by-product hydrogen halide |