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.
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 Dihydroxybenzenes Tetrahydroxybenzenes Pentahydroxybenzene Hexahydroxybenzene
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