CH3COOR

CH3COOR is a generic representation of an acetate ester, in which the acyl portion comes from acetic acid (CH3CO-) and the alkoxy group is OR, derived from an alcohol ROH. This formula denotes all esters of acetic acid, with R denoting an alkyl or aryl group. Common examples include methyl acetate (R = CH3) and ethyl acetate (R = C2H5).

Acetate esters are typically prepared by esterifying acetic acid with the corresponding alcohol under acidic conditions, or by acetylating alcohols with acetyl chloride or acetic anhydride. Industrial routes often rely on precise esterification or acylation steps to control purity and yield.

Chemically, CH3COOR features a carbonyl group adjacent to an oxygen atom, giving moderate polarity and characteristic ester reactivity. It undergoes hydrolysis to form acetic acid and the corresponding alcohol: CH3COOR + H2O → CH3COOH + ROH (acidic conditions), or base-catalyzed hydrolysis: CH3COOR + OH− → CH3COO− + ROH. Transesterification, where the OR group exchanges with another alcohol, is also common.

Applications of acetate esters are broad. Ethyl acetate is a widely used solvent in paints, coatings, inks, and nail polish removers, while methyl acetate serves as a solvent in various coatings and adhesives. Some acetate esters are used in flavors and fragrances, and as intermediates in organic synthesis.

Safety and handling depend on identity and concentration; acetates are generally flammable and must be managed to minimize inhalation exposure and environmental release.