| 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} |
| 115 | DF | .~.~ Forming compound containing plural metals {4} |
| 116 | | .~.~.~ And halogen |