[pahy-ruh-gal-awl, -ol, -guh-lawl, -lol] /ˌpaɪ rəˈgæl ɔl, -ɒl, -gəˈlɔl, -ˈlɒl/

a white, crystalline, water-soluble, poisonous, solid, phenolic compound, C 6 H 3 (OH) 3 , obtained by heating 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.
a white lustrous crystalline soluble phenol with weakly acidic properties; 1,2,3-trihydroxybenzene: used as a photographic developer and for absorbing oxygen. Formula: C6H3(OH)3

pyrogallol py·ro·gal·lol (pī’rō-gāl’ôl’, -ōl’, -gô’lôl’, -lōl’)
A white, toxic crystalline phenol used as a photographic developer and to treat certain skin diseases. Also called pyrogallic acid.


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