[pahy-ruh-gal-awl, -ol, -guh-lawl, -lol]
- a white, crystalline, water-soluble, poisonous, solid, phenolic compound, C6H3(OH)3, obtained by heating gallic acid and water: used chiefly as a developer in photography, as a mordant for wool, in dyeing, and in medicine in the treatment of certain skin conditions.
Origin of pyrogallol
Also called pyrogallic acid.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for pyrogallol
Tanning materials are divided into two main classes: Pyrogallol, Catechol.Leather
K. J. Adcock
Sumach is the other pyrogallol tan of commercial importance.Animal Proteins
Hugh Garner Bennett
The pyrogallol method of Preisz also proved to be unreliable in his hands.Contagious Abortion of Cows
Ward J. MacNeal
The light from ozone acting on pyrogallol solution is especially bright under certain conditions.
This is especially well seen in the action of various oxidizers on pyrogallol and H2O2 recorded in Table 10.
- a white lustrous crystalline soluble phenol with weakly acidic properties; 1,2,3-trihydroxybenzene: used as a photographic developer and for absorbing oxygen. Formula: C 6 H 3 (OH) 3
C20: from pyro- + gall (ic)² + -ol 1
pyrogallol(pī′rō-găl′ôl′, -ōl′, -gô′lôl′, -lōl′)
- A white, toxic crystalline phenol used as a photographic developer and to treat certain skin diseases.pyrogallic acid