The trihydroxybenzenes (or benzenetriols) are organic compounds with the formula C6H3(OH)3. Also classified as polyphenols, they feature three hydroxyl groups substituted onto a benzene ring. They are white solids with modest solubility in water.

Pyrogallol Hydroxyquinol Phloroglucinol Benzene-1,2,3-triol Benzene-1,2,4-triol Benzene-1,3,5-triol

In biochemistry

The enzyme pyrogallol hydroxytransferase transforms benzene-1,2,3-triol (pyrogallol) into benzene-1,3,5-triol (phloroglucinol) and vice versa. It uses benzene-1,2,3,5-tetrol as a cosubstrate, thanks to which it achieves a non-redox transhydroxylation. This enzyme can be found in Pelobacter acidigallici.

See also