Category
Chemical Primary Standard
CAS Number
85-44-9
Molecular Formula
C8H4O3
Molecular Weight
148.12 g/mol
Synonym

1,3-Isobenzofurandione; -Benzenedicarboxylic Anhydride; ,3-Phthalandione; 2-Benzofuran-1,3-dione; Phthalandione; Phthalanhydride; Phthalic Acid Anhydride;

Keywords
Aromatics
Slide_1

Phthalic anhydride is an aromatic organic compound with the formula C₈H₄O₃, formed by the dehydration of phthalic acid. It is widely used in the production of plasticizers, dyes, resins, and other industrial chemicals.