Anhydrides, including Phthalic Anhydride, Maleic Anhydride and Acetic Anhydride, are key intermediates used in the production of a wide range of chemical and industrial products. These reactive compounds play a critical role in manufacturing plasticizers, polyester resins, alkyd resins, agrochemicals, and pharmaceuticals. Thanks to their high reactivity and versatility, anhydrides are widely applied in sectors such as coatings, construction chemicals, textiles, and specialty chemicals.