Gallic acid

Encyclopedia : G : GA : GAL : Gallic acid

Chemical structure of gallic acid

Gallic acid is an organic acid, also known as 3,4,5-trihydroxybenzoic acid, found in gallnuts, sumac, witch hazel, tea leaves, oak bark, and other plants. The chemical formula is C₆H₂(OH)₃CO₂H. Gallic acid is found both free and as part of tannins.it is commonly used in the pharmaceutical industry

The COOH group has a pKa of 4.5, and the phenolic OHs have pKa of 10.

Salts and esters of gallic acid are termed gallates.

External link

• [King's American Dispensatory (1898) entry on Gallic acid]

• For a full list of external links to MSDSs, spectroscopic data, commercial chemicals suppliers etc. for this compound, see [Chemical sources].

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