Lactic acid (inci)

Author: Prof. Dr. med. Peter Altmeyer

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Last updated on: 29.10.2020

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Synonym(s)

2-hydroxypropanoic acid; 2-hydroxypropionic acid; acidum lacticum; CAS number: 50-21-5; Lactic acid

Definition
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An organic hydroxy acid having the molecular formula C3H6O3 and the linear formula CH3-CHOH-COOH. A clear, colourless to pale yellowish, syrupy, caustic, almost odourless, hygroscopic liquid which is readily miscible with water and ethanol.

Field of application/use
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Component of the protective acid mantle of the skin. Furthermore in the acidified sugar- or starch-containing liquids, such as sour milk, sauerkraut, pickled cucumbers etc.; also in the stomach, intestinal contents and in the muscles. The salts of lactic acid are called lactates.

Hom: Lactic acid is e.g. prescribed for rheumatic-poisonous diseases.
Cosmetics: fruit acid, humectant, buffer substance, cares for the skin

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Last updated on: 29.10.2020