pyrogallol

American  

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

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.

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pyrogallol British  

/ 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

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Other Word Forms

• pyrogallic
  adjective

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Etymology

Origin of pyrogallol

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

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Example Sentences

See Examples For:

pyrogallol

When ozone is bubbled through a dilute pyrogallol solution, the liquid glows brightly though no heat is evolved.

From Time Magazine Archive

A brown sepia is obtained by toning first with potassium permanganate, 1 per cent. of water, then, after washing, with a solution of pyrogallol.

From Photographic Reproduction Processes by Peter C. Duchochois

The class of tanning materials which produce the most suitable leather for this particular purpose belong to the pyrogallol group, of which a well known and important example is sumach.

From Bookbinding, and the Care of Books A handbook for Amateurs, Bookbinders & Librarians by Noel Rooke

Of the trihydroxybenzenes pyrogallol and phloroglucinol only were included in these investigations.

From Synthetic Tannins by Georg Grasser

It consists mainly of a mixture of phenol, cresol, guaiacol, creosol, xylenol, dimethyl guaiacol, ethyl guaiacol, and various methyl ethers of pyrogallol.

From Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 6 "Coucy-le-Château" to "Crocodile" by Various

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