Phthalic Anhydride is one of the most important organic chemical raw materials. The main Derivatives have Dibutyl phthalate, DOP, isobutyl ethyl malonate and etc. Used for PVC of plasticizer (easy process and soften). Also can be used in the production of unsaturatedpolyester Resin, Alkyd resin, dyeandpigment, paint, Food additivesThe medicine, desulfurate agentphenolphthalein, Pesticide, theImine sulphur phosphorous, Consume grass looseandSaccharin sodiumEtc.