| 423 / | HD | CHEMISTRY OF INORGANIC COMPOUNDS |
| 1 | DF | TREATING MIXTURE TO OBTAIN METAL CONTAINING COMPOUND {15} |
| 111 | DF | .~ Group IIIA metal or beryllium (Al, Ga, In, Tl, or Be) {9} |
| 133 | DF | .~.~ Volatizing {2} |
| 135 | | .~.~.~ Group IIIA metal {1} |
| 136 | DF | .~.~.~.~> Utilizing elemental halogen as reactant |