Definition of gallic acid in English:

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gallic acid

Pronunciation: /ˈɡalik/ Pronunciation: /ˈɡôlik/


An acid extracted from oak galls and other vegetable products, formerly used in making ink.
  • Alternative name: 3, 4, 5-trihydroxybenzoic acid; chemical formula: C6H2(OH)3COOH.
Example sentences
  • Pyrogallol, tannic acid, and gallic acid were obtained from Zhunyi Reagents (Guizou, China).
  • Modern compositions use other unstable, albeit somewhat less hazardous, aromatic compounds such as gallic acid or the salts of aromatic acids including sodium salicylate and potassium benzoate.
  • Then, the paper is floated on a mixture containing silver nitrate and gallic acid.


Late 18th century: gallic from Latin galla 'oak gall' (see gall3) + -ic.

For editors and proofreaders

Syllabification: gal·lic ac·id

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