423 / | HD | CHEMISTRY OF INORGANIC COMPOUNDS |
276 | DF | BORON OR COMPOUND THEREOF {5} |
277 | DF | .~ Oxygen containing {3} |
279 | DF | .~.~ Ternary compound containing metal or ammonium {1} |
280 | .~.~.~ Utilizing dissolved or liquid reactant {2} | |
281 | DF | .~.~.~.~> Peroxide |
282 | DF | .~.~.~.~> Carbon containing |