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Qu'est-ce (qui) est pyrogallol$65880$ - définition
CHEMICAL COMPOUND
2,6-dimethoxyphenol; 2-hydroxy-1,3-dimethoxybenzene; Pyrogallol 1,3-dimethyl ether; Dimethoxyphenol
Pyrogallol
·noun A phenol metameric with phloroglucin, obtained by the distillation of gallic acid as a poisonous white crystalline substance having acid properties, and hence called also pyrogallic acid. It is a strong reducer, and is used as a developer in photography and in the production of certain dyes.
pyrogallol
[?p??r?(?)'gal?l]
¦ noun Chemistry a weakly acid crystalline organic compound chiefly used as a photographic developer.
Hydrolysable tannin
CLASS OF CHEMICAL COMPOUNDS
Hydrolyzable tannins; Hydrolysable tannins; Hydrolyzable tannin; Hydrolyzable Tannin; Pyrogallol-type tannin; Pyrogallol-type tannins
A hydrolyzable tannin or pyrogallol-type tannin is a type of tannin that, on heating with hydrochloric or sulfuric acids, yields gallic or ellagic acids.
Wikipédia
Syringol
Syringol is the organic compound with the formula HO(CH3O)2C6H3. The molecule is a phenol, with methoxy groups in the flanking (2 and 6) positions. 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. As such, syringol is an important component of wood smoke.
