| 210 / | HD | LIQUID PURIFICATION OR SEPARATION |
| 600 | DF | PROCESSES {14} |
| 702 | DF | .~ Making an insoluble substance or accreting suspended constituents {14} |
| 729 | DF | .~.~ Utilizing organic precipitant {2} |
| 732 | DF | .~.~.~ Synthetic polymer {2} |
| 735 | DF | .~.~.~.~ Nitrogen containing (e.g., amine, azo, etc.) {1} |
| 736 | ![]() | .~.~.~.~.~ Derived from alkyl halide or epihalophydrin reactant |