has role long-chain fatty acid octadecanoate saturated fatty acid octadecanoic acid C18:0 Oktadekansaeure octadecoic acid octadecanoic acid A C<small>₁₈</small> straight-chain saturated fatty acid component of many animal and vegetable lipids. As well as in the diet, it is used in hardening soaps, softening plastics and in making cosmetics, candles and plastics. Stearinsaeure 18:0 octadecanoic acid acide stearique Octadecanoic acid acide octadecanoique stearic acid Octadecansaeure CH3-[CH2]16-COOH n-octadecanoic acid STEARIC ACID octadecane straight-chain saturated fatty acid plant metabolite human metabolite Daphnia magna metabolite algal metabolite