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

Gall′ate, a salt of gallic acid; Gall′fly, an insect which occasions gall on plants by puncturing.—adj.

From Chambers's Twentieth Century Dictionary (part 2 of 4: E-M) by Various

I excite my paper with equal proportions of saturated solution of gallic acid and aceto-nitrate of silver, one or two drops of each to the drachm of distilled water.

From Notes and Queries, Number 229, March 18, 1854 A Medium of Inter-communication for Literary Men, Artists, Antiquaries, Genealogists, etc by Various

They include the extraction of gallic acid from chestnut-bark, the preparation of preserved citrons and other delicacies, and of macaroni and similar foods and the manufacture of fancy goods and cigars.

From Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 4 "Coquelin" to "Costume" by Various