Product Name: Tannic Acid
Properties: Pale yellow or light brown amorphous powder; oxidizes and darkens when exposed to air; odorless with astringent taste. Soluble in water, ethanol, acetone, and ethyl acetate.
CAS NO.: 1401-55-4
Molecular Formula: C₇₆H₅₂O₄₆
Molecular Weight: 1701.18
Structural Formula:


Applications:
1. Used in iron gall ink manufacturing and metal rust prevention; drilling mud treatment in petroleum drilling;
2. Textile printing and dyeing: used as leather tanning agent, mordant, coagulant, protein agent, alkaloid precipitant;
3. Pharmaceutical: raw material for pharmaceutical gallic acid, pyrogallic acid, sulfonamide drugs; also widely used in cosmetics;
4. Fine chemicals: initial raw material for producing ellagic acid, gallic acid, gallate esters, pyrogallic acid and other gallic acid series products;
5. Food: used as clarifying agent for low-alcohol beverages, bromelain food processing, etc.; can selectively adsorb proteins in wort, reduce aldehyde substances in beer, and improve beer non-biological stability and flavor stability;