Stearic Acid – Lubricant, Emulsifier & Consistency Agent

Product name: Stearic Acid

Synonyms: Octadecanoic acid

CAS: 57-11-4

MF: C18H36O2

MW: 284.48


Stearic acid is a saturated fatty acid widely used as a lubricant, emulsifying agent, and consistency factor.

In tablets and capsules, it acts as a lubricant and hydrophobic matrix former.

In cosmetics and topical pharmaceuticals, it helps stabilize emulsions and provides creamy texture in creams, lotions, and sticks.

It is also used in soaps, candles, rubber, and plastics as a processing aid and structuring agent.