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

See Examples For:

gallic acid

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

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

A weak solution of iodide of iron has also the same effect, and, if blotted off at once, it will not blacken by the use of gallic acid.

From Notes and Queries, Number 203, September 17, 1853 A Medium of Inter-communication for Literary Men, Artists, Antiquaries, Genealogists, etc. by Bell, George

Other remedies have gradually lost favor in the hands of those who have had most experience with the symptom and gallic acid and supra-renal extract, the older and newer remedy, are now little depended on.

From Psychotherapy by Walsh, James J. (James Joseph)

Inky black colour or precipitate = gallic acid or tannic acid.

From The Elements of Bacteriological Technique A Laboratory Guide for Medical, Dental, and Technical Students. Second Edition Rewritten and Enlarged. by Eyre, J. W. H. (John William Henry)