... , stable supply, world wide delivery. Name: Maleic anhydrideMolecular Formula C4H2O3Molecular Weight 98.06CAS Registry Number 108-31-6EINECS 203-571-6Risk ... polyester resin(UPR)PharmaceuticalAgrochemicalsPaint, oil additives Maleic anhydride,99.5%,low color,high purity