Gallic acid

Gallic acid
Gallic Gal"lic (277), a. [From {Gall} the excrescence.] Pertaining to, or derived from, galls, nutgalls, and the like. [1913 Webster]

{Gallic acid} (Chem.), an organic acid, very widely distributed in the vegetable kingdom, being found in the free state in galls, tea, etc., and produced artificially. It is a white, crystalline substance, {C6H2(HO)3.CO2H}, with an astringent taste, and is a strong reducing agent, as employed in photography. It is usually prepared from tannin, and both give a dark color with iron salts, forming tannate and gallate of iron, which are the essential ingredients of common black ink. [1913 Webster]


The Collaborative International Dictionary of English. 2000.

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  • Gallic acid — IUPAC name …   Wikipedia

  • gallic acid — n. [Fr gallique < galle, GALL3] a nearly colorless, crystalline acid, (OH) 3C6H2COOH, prepared from tannins, etc. and used in photography and the manufacture of inks, dyes, etc …   English World dictionary

  • gallic acid — Chem. a white or yellowish, crystalline, sparingly water soluble solid, C7H6O5, obtained from nutgalls, used chiefly in tanning and in ink dyes. [1785 95; < F acide gallique] * * * ▪ chemical compound       substance occurring in many plants,… …   Universalium

  • gallic acid — galo rūgštis statusas T sritis chemija formulė (HO)₃C₆H₂COOH atitikmenys: angl. gallic acid rus. галловая кислота ryšiai: sinonimas – 3,4,5 trihidroksibenzenkarboksirūgštis …   Chemijos terminų aiškinamasis žodynas

  • gallic acid — Usually made from tannic acid or nutgalls; used locally as an astringent, for the same purpose as tannic acid. * * * gal·lic acid .gal ik , .gȯ lik n a white crystalline acid C7H6O5 found widely in plants or combined in tannins and used esp. in… …   Medical dictionary

  • gallic acid — noun a) a phenolic carboxylic acid, 3,4,5 trihydroxybenzoic acid, found in galls, tea, the bark of some trees etc; a constituent of tannin b) the supposed acid HGaO, the acid form of the amphoteric gallium hydroxide Ga(OH), known only as alkali… …   Wiktionary

  • gallic acid — (= 3,4,5 trihydroxybenzoic acid) Phenolic acid, commonly found in flowering plants, usually esterified with tannins …   Dictionary of molecular biology

  • gallic acid — noun Etymology: French gallique, from galle gall Date: 1788 a white crystalline acid C7H6O5 found widely in plants or combined in tannins and used especially in dyes and as a photographic developer …   New Collegiate Dictionary

  • gallic acid — noun Chemistry an organic acid extracted from oak galls and other plant products. Origin C18: from L. galla (see gall3) + ic …   English new terms dictionary

  • gallic acid — /gælɪk ˈæsəd/ (say galik asuhd) noun a complex phenolic acid, C6H2(OH)3CO2H, a white or yellowish crystalline powder found in nut galls, mangoes, and other plants …  

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