pyrogallol

[ pahy-ruh-gal-awl, -ol, -guh-lawl, -lol ]

noun

1. a white, crystalline, water-soluble, poisonous, solid, phenolic compound, C 6 H 3 (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.

pyrogallol

/ ˌpaɪrəʊˈɡælɒl /

noun

1. 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

Derived Forms

• ˌpyroˈgallic, adjective

Other Words From

• py·ro·gal·lic [pahy-r, uh, -, gal, -ik, -, gaw, -lik], adjective

Word History and Origins

Origin of pyrogallol¹

First recorded in 1875–80; pyro- + gall(ic) ² + -ol ¹

Word History and Origins

Origin of pyrogallol¹

C20: from pyro- + gall ( ic )² + -ol ¹

Example Sentences

Sumach is the other pyrogallol tan of commercial importance.

From Project Gutenberg

Pyrogallol is valuable, and is employed in the same manner and strength as chrysarobin.

From Project Gutenberg

Newton employs it in combination with pyrogallol and soda in the development of bromo-gelatine plates.

From Project Gutenberg

The phthaleïn formed from gallic acid and phthalic anhydride really results from the union of the latter with pyrogallol.

From Project Gutenberg

The tannins are divided into two general classes, known respectively as the pyrogallol tannins and the catechol tannins.

From Project Gutenberg