Diethylene glycol, also known as diethylene glycol, forms esters when reacting with acid anhydrides. It forms ethers when reacting with alkyl sulfates or halogenated hydrocarbons. It is mainly used as a gas dehydrating agent and extractant, and is also used as a lubricant and finishing agent for textiles. It is obtained by the reaction of ethylene oxide and ethylene glycol. Diethylene glycol has been widely used in various cosmetics as a solvent, heat preservation agent, and viscosity control agent. It has a history of nearly 20 years of use in my country, and no problems have been found during this period.