gallic-acid

gallic acid

noun Chemistry.
a white or yellowish, crystalline, sparingly water-soluble solid, C 7 H 6 O 5 , obtained from nutgalls, used chiefly in tanning and in ink dyes.

Origin:
1785–95; < French acide gallique

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gallic acid
 
n
a colourless crystalline compound obtained from tannin: used as a tanning agent and in making inks, paper, and pyrogallol; 3,4,5-trihydroxybenzoic acid. Formula: C6H2(OH)3COOH
 
[C18: from French gallique; see gall³]

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