Production capacity: 1200 t/year Other name£ºgallnut acid Purity: % ¡ý99 Sulfate£º ppm ¡ü10 Tannic acid test: ppm ¡ü1.0 Loss on drying: % ¡ü10.0 or 0.5 Residue on ignition: % ¡ü0.1 Turbidity: ppm ¡ü10 Color number£º fan ¡ü200 Usage£ºmainly used in medicine¡¢dyestuff¡¢chemical and synthesis industry , also used in analysis in rare metal. Storage£ºkept in a well-closed container. Packing: weave bag with plastic bag inside, n.W. 25kg/drum. 25kg/drum