... used in the production of tan-reagent of leather, polygenetic dye, rubber concretion, albumen reagent, alkaloid precipitator, mill run inhibitor,wine ... ”3, FCC (1981); FCC-IV " Name: Food Grade Tannic Acid Molecular formula: C76H52O46 Molecular weight: 1701.18 Food Grade Tannic Acid Appearance: light yellow to light brown powder ...