pyrogallic acid


pyrogallic acid
Pyrogallol Pyr`o*gal"lol, n. [Pyrogallic + -ol.] (Chem.) 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. [1913 Webster]

The Collaborative International Dictionary of English. 2000.