White crystalline solid used in the manufacture of Alkyd Resin Coatings, Unsaturated Polyester Resins, and Plasticizers. This product is 99.7% pure.

Stepan Phthalic Anhydride is used to produce polyester polyols for a variety of Polyurethane markets and to make polyester resins for reinforced plastics. This versatile chemical is also used in the manufacture of alkyd resins for paints and protective coatings. Phthalic Anhydride is reacted with alcohols to produce phthalate ester plasticizers for synthetic resins and plastics. Other uses for Phthalic Anhydride include the making of dye intermediates, pigments, engineering plastics, benzoic acid and phenolphthalein.