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carboxylic acid
(redirected from Carboxylic functional group)

   Also found in: Medical, Encyclopedia, Wikipedia 0.10 sec.

carboxylic acid

Organic acid containing the carboxyl group (COOH) attached to another group (R), which can be hydrogen (giving methanoic acid, HCOOH) or a larger group. When R is a straight-chain alkyl group (such as CH3 or CH3CH2), the acid is known as a fatty acid.

Examples of carboxylic acids include ethanoic (acetic) acid, found in vinegar, malic acid, found in rhubarb, and citric acid, contained in oranges and lemons.

The smaller carboxylic acids form a homologous series, with all the names ending -oic (methanoic acid, HCOOH; ethanoic acid, CH3COOH; propanoic acid, C2H5COOH, and so on).



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