| 252 / | HD | COMPOSITIONS |
| 186.1 | DF | OXIDATIVE BLEACHANT, OXIDANT CONTAINING, OR GENERATIVE {9} |
| 187.1 | DF | .~ Free halogen or oxy-halogen acid type {6} |
| 187.23 | DF | .~.~ Chlorite {1} |
| 187.24 | ![]() | .~.~.~ Hypochlorite {2} |
| 187.25 | DF | .~.~.~.~> Alkali metal hypochlorite {1} |
| 187.27 | DF | .~.~.~.~> Alkaline earth metal hypochlorite {1} |