Appearance: White crystalline powder Clarity and color Solution is clear and colorless PH: 7.0~8.0 Loss on drying: ≤ 0.5% Residue on ignition: ≤ 0.1% Heavy metals: ≤ 10ppm Sulphate: ≤ 0.07% Chloride: ≤ 0.014% Arsenic: ≤ 2ppm Assay: 99.0%~101.0% Related substances: A≤ 0.1%, B≤ 0.2%,C≤ 0.1%, D≤ 0.1% Capacity 60MT/month Package: 25kg/drum or according to the customers'demand