Molecules of stearic acid. Stearic acids are the sodium or potassium salts of fatty acids; pure stearic acid is obtained with difficulty from such a mixture by crystallization.
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It is made by extraction from tallow, which is the mixture of fats that are
obtained by steam treating cow fat.
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Traditionally used as a thickening agent in lotion, this vegetable derived waxy substance is also used as a hardening agent in soaps (at a .5% usage rate). Stearic acid is also used as a hardening agent in candles, vegetable or paraffin based.
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