
Acetic anhydride
Organic compound with formula (CH3CO)2O

Organic compound with formula (CH3CO)2O
Acetic anhydride, or ethanoic anhydride, is the chemical compound with the formula (CH3CO)2O. Commonly abbreviated Ac2O, it is one the simplest anhydrides of a carboxylic acid and is widely used in the production of cellulose acetate and heroin, as well as a reagent in organic synthesis. It is a colorless liquid that smells strongly of acetic acid, which is formed by its reaction with moisture in the air.
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