Fatty methyl ester is a material used to synthesize many high-quality active agents and an important intermediate for organic synthesis. It is a mutual solvent with oil and fat and possesses the features of low viscosity. So fatty methyl ester is widely used in emulsifier products in cosmetic industry, it is used as a solvent for flavor after finish machining and a brightening agent for hair in shampoo. It can also be a lubricant and oiling agent for leather.