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Product name: Tannic acid
Character: Light yellow or light brown amorphous powder, exposed to air oxidation, dark color, odorless, astringent taste. Soluble in water, ethanol, acetone, ethyl acetate.
CAS NO.: 1401-55-4
Molecular formula: C₇₆H₅₂O₄₆
Molecular weight: 1701.18
Structural formula:

To use:
Used in the manufacture of ferric acid ink, metal rust prevention, oil drilling mud treatment;
Textile printing and dyeing, can be used for leather tanning agent, mordant, coagulant, protein agent, alkaloid precipitator;
In the field of medicine, it is the raw material of pharmaceutical betaconic acid, pyroacid and sulfanilamide drugs that are widely used in cosmetics
In terms of fine chemicals, it is the initial raw material for the production of gallic acid series products such as ellagic acid, gallic acid, gallic acid ester, pyrogallic acid, etc.
In the field of food, it can be applied to food antioxidants, clarifiers of low-alcohol wine, bromelain food processing, etc. It can selectively adsorb proteins from wort, reduce aldehydes of beer, and improve the abiotic stability and flavor stability of beer.
In the field of animal nutrition, it can replace anti-bacterial, reduce zinc and maintain intestinal health.