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.

---

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

---

Etymology

Origin of gallic acid

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

Example Sentences

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

Tacahout, tak′a-howt, n. an Arab name for the small gall formed on the tamarisk-tree, and used as one source for obtaining gallic acid.

From Chambers's Twentieth Century Dictionary (part 4 of 4: S-Z and supplements) by Various

Medicinally, gallic acid has been, and is still, largely used as an astringent, styptic and haemostatic.

From Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 4 "G" to "Gaskell, Elizabeth" by Various

Then take three parts of a concentrated solution of gallic acid, and one part of a nitrate of silver solution, 60 grains to the ounce of water; mix together, and pour on the plate.

From Notes and Queries, Number 217, December 24, 1853 A Medium of Inter-communication for Literary Men, Artists, Antiquaries, Genealogists, etc. by Various