Used as a food additive and pharmaceutical material. Quality standard: enterprise standard Item Index pH 9.0 - 10.7 E1%1cm ≥565 Extinction ratio 3.0 - 5.0% Total Zn 3.0 - 5.0% Free Zn ≤0.1% Lead ≤0.0005% Arsenic ≤0.0002% Sulfate ash ≤36.0% Loss on drying ≤4.0% inner packing:2.5kg/plastic bag out packing:25kg/fiber drum Drum dimensions: 36 x 36 x 50cm G.W.: 27kg Min Order Quantity:50kg Payment Term:T/T, D/P, L/C Price Term:FOB Shanghai, CIF, CNF