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Wine is acidic.

The main contributor to its acidity is acetic acid. Ethanol (aka ethyl alcohol, grain alcohol, drinking alcohol) breaks down (oxidizes) into acetaldehyde and then further into acetic acid (aka vinegar). The acetic acid is always present in small concentrations and over time oxidation occurs and the concentration increases. The rate increases substantially if the wine is exposed to large amounts of oxygen (open a bottle and leave it out).

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16y ago

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