Molecular Structure of Kojic Acid

Kojic acid is a compound produced by certain fungi. It is also a by-product of some fermented foods. Kojic acid has been synthesized for its beneficial properties.

Description

• Kojic acid is also known chemically as 5-hydroxy-2-hydroxymethyl-4H-pyran-4-one. It is a tan-colored powder with a melting point of 152 to 155 degrees Celsius.

Structure

• The molecular formula for Kojic acid is C6H6O4. It consists of a five-carbon hexagonal ring with an oxygen atom completing the ring. The carbon atom opposite the oxygen atom and the carbon atom next to it bonds with a second and a third oxygen atom. The sixth carbon atom branches off from the ring and bonds with a fourth oxygen molecule.

Significance

• Kojic acid has antibacterial and antifungal properties. It also binds readily to metals such as iron and copper.

Applications

• Kojic acid is used as an anti-browning additive in foods and as an antioxidant. It is used to prevent pigmentation in seafood.

Warning

• In clinical testing, Kojic acid was found to cause tumors in mice.