Synonyms: 2,5-furandione; Dihydro-2,5-dioxo-pyran; Maleic acid anhydride;
Description: Maleic anhydride is a solid under normal conditions odorous substance consisting of a colorless rhombic crystals. Sparingly soluble in acetone, benzene, xylene, toluene, chloroform, ethyl acetate.
Application: Maleic anhydride melts at 53˚S, distilled at 202˚S, rasvoryaetsya in acetone and chloroform. Dissolved in water, it turns into maleic acid, which at 200 ° C can be converted into fumaric acid. The greater part of maleic anhydride is used as a raw material for polyester resins. Maleic anhydride is also used in the manufacture of alkyd resins, where its use allows to obtain alkyd coatings with a high mechanical performance and extended life. Maleic anhydride is a raw material for the production of tetrahydrofuran, tetrahydro phthalic anhydride, films and synthetic fibers, pharmaceuticals, detergents, plasticizers, maleic acid, succinic acid, fumaric acid and malic acid, a number of chemicals for agriculture, such as plant growth regulators (hydrazo maleic acid), defoliants, insecticides and fungicides, additives and stabilizers for fuels and oils. Maleic anhydride is also applicable for purification of aromatic compounds from sulfur and nitrogen compounds.