| 423 / | HD | CHEMISTRY OF INORGANIC COMPOUNDS |
| 1 | DF | TREATING MIXTURE TO OBTAIN METAL CONTAINING COMPOUND {15} |
| 155 | DF | .~ Alkaline earth metal (Mg, Ca, Sr, or Ba) {11} |
| 158 | DF | .~.~ Forming insoluble substance in liquid {8} |
| 162 | | .~.~.~ Nitrating or ammoniating |