... (Unsaturated polyester resins), Glass fiber reinforced plastics,etc. Fumaric Acid Tech Grade 99.5% Molecular Formula: C4H4O4CAS NO: 110-17-8Appearance: White ... be applied to glass fiber reinforced plastics, paint and coating, Feed acidification agent, Acidity regulator, Food preservative, etc. Specification: ParameterGradeFumaric AcidTechnical ...