gallicacid

gallicacid
gal·lic acid (gălʹĭk, gôʹlĭk) n.
A colorless crystalline compound, C7H6O5, derived from tannin and used as a tanning agent, as an ink dye, and in photography and the manufacture of paper.
  [French acide gallique, from galle, plant gall. See gall3.]

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Universalium. 2010.

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