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Malic acid

Structural formula of malic acid

Malic acid is a tart-tasting organic acid that plays a role in many sour or tart foods. The chemical structure of malic acid is HO₂C-CH₂-CH(OH)-CO₂H.

Apples contain malic acid, which contributes to the sourness of a green apple.

Malic acid can make a wine taste tart, although the amount decreases with increasing ripeness. The process of malolactic fermentation converts malic acid to much milder lactic acid.

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