As acidic compounds, organic acids are characteristic components of a large number of natural substances. An important group are the fruit acids, often hydroxycarboxylic acids such as citric acid or tartaric acid.
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The term fruit acids is a collective term for the organic hydroxycarboxylic acids, dicarboxylic acids and tricarboxylic acids found in fruit. These substances do not have to be labeled as additives when used in food.