1.Phthalic anhydride is one of the most important organic chemical raw materials, its main derivatives are dibutyl phthalate, dioctyl ester and diisobutyl ester, and can be used as plasticizer for PVC, etc.
2.It can also be used in the production of unsaturated polyester resin, alkyd resin, dyes and pigments, a variety of paints, food additives, etc.
