Tannic Acid ACS Reagent

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50g Tannic Acid ACS Reagent฿0,00000000
100g Tannic Acid ACS Reagent฿0,00000000
500g Tannic Acid ACS Reagent฿0,00000000

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

Appearance – Powder with lumps

Flash point – 199°C (390°F)

Melting point/freezing point – 218°C (424°F) – lit.

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