Phthalic anhydride is a cyclic dicarboxylic anhydride and is anhydride of phthalic acid. The chemical formula of phthalic anhydride is C8H4O3, and its molecular weight is 148.1 g/mol. The melting point of phthalic anhydride is 131 °C and its boiling point is 295°C. The density of phthalic anhydride is 1.53 […]