... dextrin up to standard Residue on ignition % ≤0.2 Content of gallic acid %< 7 Guangzhou Topwork Chemical Co., Ltd, is ... products are:Tannic Acid(Pharmaceutical/Tech/Dyes/Food Grade),Gallic acid(3,4,5-Trihydroxybenzoic acid),Pyrogallol(1,2,3-Benzenetriol),Ethyl ... gallate, Progyl Gallate, n-Octyl gallate,3,4,5-Trimethoxybenzaldehyde,Methyl 3, ...