gallic acid

gal·lic ac·id

(gal'ik as'id),

Usually made from tannic acid or nutgalls; used locally as an astringent, for the same purpose as tannic acid.

gallic acid

C₆H₂(OH)₃COOH, a colorless crystalline acid. It occurs naturally as an excrescence on the twigs of trees, esp. oaks, as a reaction to the deposition of gall wasp eggs. It is used as a skin astringent and in the manufacture of writing inks and dyes.

CAS # 149-91-7

See also: acid

gal·lic ac·id

(gal'ik as'id)

A topical astringent.

gallic acid (gal´ik),

n an astringent used topically, made from tannic acid or nutgalls, and chemically known as 3,4,5-trihydroxybenzoic acid.