Phthalic Anhydride

Phthalic anhydride is an organic compound with the formula C6H4(CO)2O. It is the anhydride of phthalic acid. Phthalic anhydride is the principal commercial form of phthalic acid.
  • Molar Mass: 148.1 g/mol
  • Appearance: White Crystals
  • Odor: Characteristic
  • Density: 1.53 g/cm3, solid; 1.20 g/mL, melted
  • Melting Point: 131.6 °C (268.9 °F; 404.8 K)
  • Boiling Point: Sublimes at 295 °C (563 °F; 568 K)
  • Solubility in Water: 0.62 g/100g (20–25 °C); 19.0 g/100 g (100 °C); slow reaction
  • Vapor Pressure: 0.0015 mmHg (20 °C)