Phthalic anhydride (PA) is an aromatic anhydride widely used as a key industrial intermediate for the manufacture of plasticizers (phthalate esters), alkyd resins, unsaturated polyester resins and other specialty chemicals. It is supplied as a white crystalline solid and requires corrosion-resistant handling and EHS controls.
- Applications
Plasticizer production
Phthalic anhydride is esterified to produce phthalate plasticizers (e.g., DOP, DINP) used in PVC and other polymer formulations. - Alkyd resin manufacture
Phthalic anhydride is a principal raw material for oil-modified alkyd resins used in coatings, paints and varnishes. - Unsaturated polyester resins
Phthalic anhydride is used in the production of unsaturated polyesters for fiberglass-reinforced plastics and composites. - Polymer intermediates and polyesters
Phthalic anhydride is used to produce terephthalate/iso-phthalate co-monomers and specialty polyester intermediates. - Dyes and pigments intermediates
Phthalic anhydride serves as a starting material for various dye and pigment chemistries where phthalic derivatives are required. - Plastic & lubricant additive intermediates
Used as an intermediate for additives and performance chemicals in lubricants and polymer additives. - Chemical research and reagent use
Used as a reagent and intermediate in organic synthesis and industrial R&D.
