... 100% gallotannic acid Tannic acid Professional manufacturerFor medicinal or food use Strict quality contralTannic Acid 80%-98%Extracted from Chinese Gallnuts (Galla Chinensis). For beer, wine ... 2.Purity:81%min. 3.Technical,Food Grade,Medical Grade etc., 4.Synonms :Tannic acid, Tannin, Gallotannic acid Synonms : Tannic acid, Tannin, Gallotannic acid Molecular Formula: C76H52O46 ...