Potassium stearate
# Potassium stearate

Potassium stearate is a metal-organic compound, a salt of potassium and stearic acid with the chemical formula C $_{18}H$ $_{35}KO$ $_2.$ The compound is classified as a metallic soap, i.e. a metal derivative of a fatty acid.

## Synthesis

Potassium stearate may be prepared by saturating a hot alcoholic solution of stearic acid with alcoholic potash.

## Physical properties

The compound forms colorless crystals.

Slightly soluble in cold water, soluble in hot water, ethanol, insoluble in ether, chloroform, carbon disulfide. A component of liquid soap.

## Uses

The compound is primarily used as an emulsifier in cosmetics and in food products. It is also used as a cleansing ingredient and lubricant.

## Hazards

Causes skin irritation and serious eye irritation.

