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TANNICACID

Tannic acid

Tannic acid is a specific commercial form of tannin, a type of polyphenol. Its weak acidity is due to the numerous phenol groups in the structure. The chemical formula for commercial tannic acid is often given as C₇₆H₅₂O₄₆, which corresponds with decagalloyl glucose, but in fact it is a mixture of polygalloyl glucoses or polygalloyl quinic acid esters with the number of galloyl moieties per molecule ranging from 2 up to 12 depending on the plant source used to extract the tannic acid. Commercial tannic acid is usually extracted from any of the following plant part: Tara pods, gallnuts from Rhus semialata or Quercus ...

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tannic acid

Noun

1. any of various complex phenols extracted from the bark or galls of trees; used in tanning

The above text is a snippet from Wiktionary: tannic acid
and as such is available under the Creative Commons Attribution/Share-Alike License.

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