Phthalic anhydride
Compounds
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Phthalic anhydride is the organic compound with the formula C₆H₄(CO)₂O. It is the anhydride of phthalic acid. Phthalic anhydride is a principal commercial form of phthalic acid. It was the first anhydride of a dicarboxylic acid to be used... Wikipedia
Formula: C8H4O3
Molar mass: 148.1 g/mol
Melting point: 267.8°F (131°C)
Boiling point: 563°F (295°C)
Density: 1.53 g/cm³