Stearic acid is used as a lubricating agent. It is used as a food additive. Used as in the production of detergents. It is widely used in cosmetics, soaps, and shampoos.Stearic Acid is a saturated long-chain fatty acid with an 18-carbon backbone. Stearic acid is found in various animal and plant fats, and is a major component of cocoa butter and shea butter.