Tannic Acid ACS Reagent

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art: N/A
Formula C76H52O46
Molar mass 1701.19 g/mol
CAS number 1401-55-4

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Description

Tannic acid is a specific form of tannin, a type of polyphenol. Its weak acidity (pKa around 10) 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. Tannic acid is a light yellow to tan solid with a faint odor. Sinks and mixes with water.

Formula
C76H52O46
Molar mass
1701.19 g/mol
CAS Number
1401-55-4
Density
2.12 g/cm3
Purity/Grade
ACS Reagent
Apearance
Powder with lumps
Flash point
199°C (390°F)
Melting point/freezing point
218°C (424°F) – lit.
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