heksansýra

Heksansýra, also known as caproic acid, is a straight-chain fatty acid with the chemical formula CH3(CH2)4COOH. It is a saturated carboxylic acid with six carbon atoms. At room temperature, heksansýra is a colorless oily liquid with a distinctive odor described as unpleasant, rancid, or cheesy. This odor is characteristic of short-chain fatty acids.

Heksansýra occurs naturally in the milk of mammals, including cows and goats, and is also found in some plant oils and animal fats. It is produced industrially through the oxidation of hexanal or by the hydrolysis of capronitrile.

Due to its relatively short carbon chain, heksansýra is moderately soluble in water and soluble in organic solvents like ethanol and ether. It is a weak acid, as are all carboxylic acids. In chemical reactions, it behaves like other carboxylic acids, undergoing esterification, reduction, and salt formation.

Heksansýra has various applications. It is used in the synthesis of esters, which are often employed as flavorings and fragrances, particularly in artificial butter, cheese, and fruit flavors. It can also be used in the production of certain chemicals and pharmaceuticals. Its presence in body odor is a contributing factor to the smell of unwashed human skin.