tannic acid


  • WordNet 3.6
    • n tannic acid any of various complex phenolic substances of plant origin; used in tanning and in medicine
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Webster's Revised Unabridged Dictionary
    • Tannic acid (Chem) An acid obtained from nutgalls as a yellow amorphous substance, C14H10O9, having an astringent taste, and forming with ferric salts a bluish-black compound, which is the basis of common ink. Called also tannin, and gallotannic acid.
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Chambers's Twentieth Century Dictionary
    • Tannic acid an acid forming the astringent principle of the bark of oak and other trees, used in tanning and in medicine
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Chambers's Twentieth Century Dictionary
Fr. tannin.


In literature:

Maiden determined the percentage of mimosa tannic acid in the perfectly dry bark as 8.62.
"Australia Twice Traversed, The Romance of Exploration" by Ernest Giles
The quantity of stimulant and tannic acid contained in an ordinary cup of tea, coffee, and cocoa or chocolate is given in Table I.
"Woman's Institute Library of Cookery, Vol. 5" by Woman's Institute of Domestic Arts and Sciences
The tannic acid in the tea acted as an astringent.
"The Worst Journey in the World, Volumes 1 and 2" by Apsley Cherry-Garrard
An acid much used, and very valuable for this purpose, is tannic acid.
"The Chemistry of Hat Manufacturing" by Watson Smith
Tannic acid and permanganate of potassium.
"Aids to Forensic Medicine and Toxicology" by W. G. Aitchison Robertson
Then dust the wound with Tannic Acid, one ounce; Iodoform, one ounce; Boracic Acid, one ounce; Calomel, one dram.
"The Veterinarian" by Chas. J. Korinek
A mixture of 1 part tannic acid and 3 parts iodoform is good in suppurating wounds.
"Special Report on Diseases of the Horse" by United States Department of Agriculture
Inky black colour or precipitate = gallic acid or tannic acid.
"The Elements of Bacteriological Technique" by John William Henry Eyre
What about the tannic acid in that tea you're drinking?
"The Ethical Engineer" by Henry Maxwell Dempsey
It precipitates with tannic and phosphotungstic acids but not with picric, acetic, trichloracetic, or chromic acids.
"The Nature of Animal Light" by E. Newton Harvey