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Chemicals: Acetic anhydride Disclaimer Acetic anhydride Name: Acetic anhydride Synonym(s): Acetic acid anhydride Acetic oxide Acetyl oxide Ethanoic anhydride Formula: (CH3CO)2O CAS Number: 108-24-7 Formula Weight: 102.1 Vapor Pressure: 4 mm Hg Boiling Point: 282°F Freezing Point: -99°F Solubility: 12% Ionization Potential:10.00 eV Specific Gravity: 1.08 Notes: Combustible colorless liquid with a strong, pungent, vinegar-like odor. Excerpted from NIOSH Pocket Guide to Chemical Hazards, US GPO 1997 J551-571