Carboxylic acids

Term for organic compounds of carbon and oxygen. They are organic acids with varying degrees of acidity, but relatively strong compared to other groups such as alcohols or phenols. A number of carboxylic acids can be found in wine, including formic acid, malic acid, butyric acid, acetic acid, salicylic acid, sorbic acid, valeric acid, tartaric acid, cinnamic acid and citric acid. Other groups of carboxylic acids are amino acids and (e.g. lactic acid) hydroxycarboxylic acids. Dichlorophenoxyacetic acid, which is used as a herbicide against weeds, is a chlorinated carboxylic acid and a derivative of acetic acid.

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