| 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 | DF | .~.~.~ Hypochlorite {2} |
| 187.27 | DF | .~.~.~.~ Alkaline earth metal hypochlorite {1} |
| 187.28 | | .~.~.~.~.~ Calcium {2} |
| 187.29 | DF | .~.~.~.~.~.~> With alkali metal compound |
| 187.3 | DF | .~.~.~.~.~.~> With alkaline earth metal compound |