Tags: Chemical Compound, Chemical Substance.

Tannic acid is a specific commercial form of tannin a type of polyphenol. Its weak acidity (pKa around 10) is due to the numerous phenol groups in the structure.

Tannic_acid.svg
IUPAC name
23-dihydroxy-5-([(2R3R4S5R6R)-3456-tetrakis(34-dihydroxy-5-[(345-trihydroxyphenyl)carbonyloxy]phenylcarbonyloxy)oxan-2-yl]methoxycarbonyl)phenyl 345-trihydroxybenzoate

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