gallic acid

American  

noun

Chemistry.

1. a white or yellowish, crystalline, sparingly water-soluble solid, C 7 H 6 O 5 , obtained from nutgalls, used chiefly in tanning and in ink dyes.

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gallic acid British  

noun

1. a colourless crystalline compound obtained from tannin: used as a tanning agent and in making inks, paper, and pyrogallol; 3,4,5-trihydroxybenzoic acid. Formula: C 6 H 2 (OH) 3 COOH

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Etymology

Origin of gallic acid

First recorded in 1785–95, gallic acid is from French acide gallique

Example Sentences

See Examples For:

gallic acid

By comparison, he added, other species of azolla that grow in Asia and Africa are between 20 and 69 grams, gallic acid equivalents per kilogram dry weight -- too high for humans to digest comfortably.

From Science Daily ● Feb. 23, 2024

The researchers determined that Carolina azolla has a total phenolic content of about 4.26 grams, gallic acid equivalents per kilogram dry weight.

From Science Daily ● Feb. 23, 2024

Very probably also the development by gallic acid and acetate of lead developer may furnish better results than the plain pyro.

From The Evolution of Photography With a Chronological Record of Discoveries, Inventions, etc., Contributions to Photographic Literature, and Personal Reminescences Extending over Forty Years by Werge, John

Sir W. Newton, in the description of his calotype process, says: "Bring out with the saturated solution of gallic acid, and when the subject begins to appear, add the aceto-nitrate of silver solution."

From Notes and Queries, Number 192, July 2, 1853 A Medium of Inter-communication for Literary Men, Artists, Antiquaries, Genealogists, etc by Various

In my experience ergot in combination with gallic acid and dilute sulphuric acid has been very efficient.

From A System of Practical Medicine by American Authors, Vol. I Volume 1: Pathology and General Diseases by Various