- An oxide - Fertiliser ingredient - Potassium carbonate - The hydroxide of potassium hydrate, a hard white brittle
substance, KOH, having strong caustic and alkaline properties; -- hence
called also caustic potash. - The impure potassium carbonate obtained by leaching wood
ashes, either as a strong solution (lye), or as a white crystalline
(pearlash).
- A colorless crystalline substance of the phenol series,
obtained by melting certain resins, as galbanum, asafetida, etc., with
caustic potash. It is also produced artificially and used in making
certain dyestuffs, as phthalein, fluorescein, and eosin.
- A white, crystalline substance, C8H7N, obtained from blue
indigo, and almost all indigo derivatives, by a process of reduction.
It is also formed from albuminous matter, together with skatol, by
putrefaction, and by fusion with caustic potash, and is present in
human excrement, as well as in the intestinal canal of some herbivora.