sodium gluconate, tech and food grade packing:25kg/bag/drum high quality and competitive price , prompt shipment specification: Item Standard Industrial grade Food grade Refining grade Identifications Meet the specifications Meet the specifications Meet the specifications Assay, % ≥ 98.0 98.0 102.0 99.0 102.0 Drying loss, % ≤ 0.50 ≤ 0.30 ≤ 0.30 Heavy metal, μg/g ≤ 10 ≤ 10 ≤ 10 Sulphate, % ≤ 0.05 ≤ 0.05 ≤ 0.05 Chloride, % ≤ 0.07 ≤ 0.07 ≤ 0.07 Reduzate, % ≤ 0.70 ≤ 0.50 ≤ 0.50 Lead, μg/g ≤ 2 ≤ 1 ≤ 1 Solubility(1.0g , 10ml water) Colorless, almost clear Colorless, almost clear PH 6.2 7.8 6.2 7.8 6.2 7.8 Arsenic salt, μg/g ≤ 2 ≤ 2 ≤ 2