... : ≤0.5%,Residue on ignition: ≤0.2% Uses: Pharmaceutical intermediate, mainly used in pharmaceutical synthesis Storage: sealed container Packing: plastic bag lined cardboard ... Additives and Feed Additives. Our strong products are:Tannic Acid(Pharmaceutical/Tech/Dyes/Food Grade),Gallic acid(3,4,5-Trihydroxybenzoic ...