... : Comply strictly with China national standard of GB5308-85. 6.Technical data: Purity % ≥ 81 Loss on drying % ≤9 insoluble in ... , sealed storage Packing: plastic bag lined carton, Net wt 25kg Technical data: Purity % ≥81 Loss on drying % ≤10 State ... brown powder, Quality index: BP 1993, AP1995 . Uses: pharmaceutical tannic acid, used for antimicrobial, treat tinea, detoxify, stop dysenterys, also used ...