Acetic acid is an organic compound with the chemical formula CH3COOH (also written as CH3CO2H or C2H4O2). It is a colorless liquid that when undiluted is also called glacial acetic acid. Vinegar is roughly 4%-8% acetic acid by volume, making acetic acid the main component of vinegar apart from water. Acetic acid has a distinctive sour taste and pungent smell. Besides its production as household vinegar, it is mainly produced as a precursor to polyvinylacetate and cellulose acetate.
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