Maleic anhydride, also known as MA, is a versatile organic compound widely used in resin production. It goes by various names, including dehydrated malic anhydride and maleic anhydride. The chemical formula of maleic anhydride is C4H2O3, the molecular weight is 98.057, and the melting point range is 51-56°C. UN Hazardous Goods Number 2215 is classified as a hazardous substance, so it is important to handle this substance with care.