... industries. 2,Content 99.5%min. Detailed Product Description1,Maleic Anhydride is mainly used for making Unsaturated Polyester Resin,.and ... acetone, erher,ethyl acelate, etc.Usage:It used in production of unsaturated polyester resin. It also is used in coating, ... pharmaceutics, agricultural, surfactant, additive of plastics, etc. It is main material of binary acid with four carbons, 1,4 ...