... Maleic Anhydride 99.5% 1.CharactersCAS NO :108-31-6 HS Code: 29171400Byname :Maleic anhydride,cis-Butenedioic anhydride,Toxilic anhydride,2, ... % maxFe content1 ppm max3.Application: 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 ...