| 252 / | HD | COMPOSITIONS |
| 380 | DF | PRESERVATIVE AGENTS {3} |
| 387 | DF | .~ Anti-corrosion {1} |
| 388 | DF | .~.~ Organic compound containing {6} |
| 389.1 | DF | .~.~.~ Component inorganic or organic comprising element other than C,H,O,N,S, and halogen {10} |
| 389.4 | | .~.~.~.~ Boron containing {1} |
| 389.41 | DF | .~.~.~.~.~> Organo boron |