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acetate anion
acetate ester

An acetate (IUPAC name: ethanoate) is either a salt or an ester of acetic acid. Its formula is written both as CH3CO2- and C2H3O2-. Chemists abbreviate acetate as OAc and AcO. Thus HOAc is the abbreviation for acetic acid, NaOAc for sodium acetate, and EtOAc for ethyl acetate.[1] Acetate is a common anion in biology.



The acetate anion, [CH3COO], is a carboxylate. It is the conjugate base of acetic acid. The acetate ion is formed by the deprotonation of acetic acid:



An acetate ester is an ester of acetic acid, with the general formula CH3CO2R, where R is an organyl group. "Acetate" is also jargon for cellulose acetate, especially fibres or other derived products such as the acetate disc used in audio record production. Cellulose acetate can be found in many household products.


  1. ^ Zumdahl, S. S. “Chemistry” Heath, 1986: Lexington, MA. ISBN: 0-669--04529-2.


See also

Simple English

Acetate, also known as ethanoate, is the salt of acetic acid (vinegar). It is formed when acetic acid is deprotonated. Its chemical formula is CH2COOH-. Acetates smell like acetic acid. They turn brown when heated.

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