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gallic acid

noun

, Chemistry.
  1. 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.


gallic acid

noun

  1. 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: C 6 H 2 (OH) 3 COOH
“Collins English Dictionary — Complete & Unabridged” 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012


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Word History and Origins

Origin of gallic acid1

First recorded in 1785–95, gallic acid is from French acide gallique
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Word History and Origins

Origin of gallic acid1

C18: from French gallique; see gall ³
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Example Sentences

A mixture of the two esters melted within the limits given for the ester of gallic acid.

The melting point behavior of the acid corresponds with that of gallic acid; it melted with decomposition at about 230°.

While the tests leading to the identification of gallic acid were being made, another series of experiments was in progress.

For the sake of comparison, an ester was made from gallic acid obtained from another source and the two agreed in properties.

All appeared to be impure gallic acid which had become brown by absorption of oxygen.

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gallicGallican