Definition of acetic anhydride in US English:

acetic anhydride


  • The anhydride of acetic acid. It is a colorless pungent liquid, used in making synthetic fibers.

    Chemical formula: (CH₃CO)₂O

    • ‘Opium is turned into heroin through a refining process that requires the application of acetic anhydride, a chemical agent manufactured in Europe, Mexico and the US.’
    • ‘Following additional washes with PBT, the slides were treated for 10 min with acetic anhydride and triethanolamine-HCl to reduce background.’
    • ‘Thailand has vowed to control the movement of chemicals used in the production of amphetamines and heroin, including acetic anhydride and chloroform.’
    • ‘Second, the alkaloid is refluxed with acetic anhydride for about five hours.’
    • ‘Nitration with nitric acid alone, or in combination with acetic acid, acetic anhydride, or sulfuric acid, are common examples of adding nitro functional groups to aromatic hydrocarbons.’