Potash

potash

(Science: chemistry) A white amorphous or granular substance which consists principally of potassium carbonate, and has a strong alkaline reaction.

The hydroxide of potassium hydrate, a hard white brittle substance, KOH, having strong caustic and alkaline properties; hence

The impure potassium carbonate obtained by leaching wood ashes, and evaporating the lye, or as a white crystalline pearl-ash. It has previously been an important source of potassium compounds, and previously used in making soap, glass, etc.

Synonym: caustic potash.

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