Stearic Acid, For Soap, Candles Cosmetic 100-500gm Letterbox Friendly - HS Code: 3823110090 - Product Code: ECE9654-X - Pack Size: 100-500gm Description Stearic acid is a saturated fatty acid with an 18-carbon chain and has the IUPAC name octadecanoic acid. It is a waxy solid, and its chemical formula is CH3(CH2)16CO2H. The salts and esters of stearic acid are called stearates. Stearic acid is one of the most common saturated fatty acids found in nature following palmitic acid.