Ethyl acetoacetate Ethyl acetoacetate is important organic synthesis material. It is used for synthesis of aminopyrin and vitamin B in medical industry; for preparation of azo yellow dyes; for preparation of apple essence and other fruity essence; for synthesis of coumaphos intermediate, hymexazol, warfarin; as new type intermediate of plant growth regulator; also widely used in medical, plastic, dyes, essence, vanish and additive industry.