423 / | HD | CHEMISTRY OF INORGANIC COMPOUNDS |
1 | DF | TREATING MIXTURE TO OBTAIN METAL CONTAINING COMPOUND {15} |
179 | DF | .~ Alkali metal (Li, Na, K, Rb, or Cs) {12} |
206.1 | .~.~ Mixture contains organic or carbonaceous impurity {2} | |
206.2 | DF | .~.~.~> Alkali carbonate from trona |
207 | DF | .~.~.~> Burning the impurity |