Lanolin is used in external preparations and cosmetics. It is a hydrophobic base with softening and lubricating effects. It can be used in preparations for dry skin and dry glasses. Lanolin is a yellow waxy substance. It is made by hydrolysis of lanolin. Various derivatives made of lanolin with different molecular weights can be used as emulsifiers and dispersants of lotions, giving the cosmetics low irritation and comfort. Mainly used in emulsion cosmetics and lipstick, powder cream, foundation cream and other cosmetics. When it is applied to the skin, it can automatically liquefy and form a film with good stretchability and lubricity, which can effectively maintain the skin. In addition, it also has excellent dispersibility, which can help pigments to be dispersed in emulsion or ointment cosmetics. It is also used as a hydrophilic emollient and brightener in cosmetics.