Overview

Lactic acid (LAK-tik AS-id) is a colorless, odorless, syrupy liquid that occurs in two isomeric forms, D-lactic acid and L-lactic acid. Isomers are two or more forms of a chemical compound with the same molecular formula, but different structural formulas and different chemical and physical properties. The D form is produced during metabolic reactions that take place in muscle tissue, while the L form is produced by yeast cells. The synthetic production of lactic acid results in a product consisting of equal amounts of the D and L forms, a mixture known as a racemic mixture.

Key Facts

Other Names:

2-hydroxypropanoic acid; ±-hydroxypropanoic acid; milk acid

Formula:

CH₃CHOHCOOH

Elements:

Carbon, hydrogen, oxygen

Compound Type:

Carboxylic acid (organic)

State:

Liquid

Molecular Weight:

90.08 g/mol

Melting Point:

16.8°C (62.2°F)

Boiling Point:

Not applicable; decomposes upon heating

Solubility:

Very soluble in water and ethanol; slightly soluble in...