potash

Potash Category:medicine
potash
<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.







potash
[Date: 1600-1700; Origin: pot + ash; because it was made by putting ash in water and letting it dry out in pots
a type of potassium used especially in farming to make the soil better



potash
Name used for various inorganic compounds of potassium, chiefly the carbonate (K2CO3), a white crystalline material formerly obtained from wood ashes
rnThey are used to make special types of glass, potassium silicate (a dehydrating agent), pigments, printing inks, and soft soaps; for washing raw wool; and as a lab reagent and general-purpose food additive. Potassium hydroxide is frequently called caustic potash, and in the fertilizer industry, potassium oxide is called potash.
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