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Pyrogallol is an organic compound with the formula C 6 H 3 (OH) 3. It is a water-soluble, white solid although samples are typically brownish because of its sensitivity toward oxygen. [ 3 ] It is one of three isomers of benzenetriols .
A hydrolysable tannin or pyrogallol-type tannin is a type of tannin that, on heating with hydrochloric or sulfuric acids, yields gallic or ellagic acids. [ 1 ] At the center of a hydrolysable tannin molecule , there is a carbohydrate (usually D-glucose but also cyclitols like quinic or shikimic acids ).
It is the symmetrically dimethylated derivative of pyrogallol. It is a colorless solid, although typical samples are brown owing to air-oxidized impurities. Together with guaiacol, syringol and its derivatives are produced by the pyrolysis of lignin. Specifically, syringol is derived from the thermal decomposition of the sinapyl alcohol component.
In enzymology, a pyrogallol 1,2-oxygenase (EC 1.13.11.35) is an enzyme that catalyzes the chemical reaction. 1,2,3-trihydroxybenzene + O 2 (Z)-5-oxohex-2-enedioate. Thus, the two substrates of this enzyme are 1,2,3-trihydroxybenzene and O 2, whereas its product is (Z)-5-oxohex-2-enedioate.
Download as PDF; Printable version; In other projects Wikidata item; ... The enzyme pyrogallol hydroxytransferase uses benzene-1,2,3,5-tetrol and benzene-1,2,3-triol ...
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In enzymology, a pyrogallol hydroxytransferase (EC 1.97.1.2) is an enzyme that catalyzes the chemical reaction 1,2,3,5-tetrahydroxybenzene + 1,2,3-trihydroxybenzene ⇌ {\displaystyle \rightleftharpoons } 1,3,5-trihydroxybenzene + 1,2,3,5-tetrahydroxybenzene
The enzyme pyrogallol hydroxytransferase uses 1,2,3,5-tetrahydroxybenzene and 1,2,3-trihydroxybenzene (pyrogallol) to produce 1,3,5-trihydroxybenzene (phloroglucinol) and 1,2,3,5-tetrahydroxybenzene. It is found in the bacterium species Pelobacter acidigallici.