Lactic acid is an organic acid. It has a molecular formula CH₃CHCOOH. It is white in the solid state and it is miscible with water. When in the dissolved state, it forms a colorless solution. Production includes both artificial syntheses as well as natural sources.
Uses of Lactic Acid
Lactic acid is used in tanning leather and dyeing wool; as a flavoring agent and preservative in processed cheese, salad dressings, pickles, and carbonated beverages; and as a raw material or a catalyst in numerous chemical processes.
Pure lactic acid, rarely prepared, is a colorless, crystalline substance that melts at 18° C (64° F); it rapidly absorbs moisture from the atmosphere.
Lactic acid occurs in the blood (in the form of its salts, called lactates) when glycogen is broken down in muscle and can be converted back to glycogen in the liver. Lactates are also the products of fermentation (q.v.) in certain bacteria. Data Source