100% gallotannic acid Tannic acid Professional manufacturer For medicinal or food use Strict quality contral 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, beverage. Very light color1.Powder Form 2.Purity:81%min. 3.Technical,Food Grade,Medical Grade etc ...