Description White or off-white powder
clarity Transparent and Clarity
Loss on drying ≤ 0.4 %
Alkalinity PH 6.0~8.0
Chloride and bromide ≤ 0.02 %
Iodate and iodine ≤ 0.002 %
Water insoluble 0.002%
Reducing substance qualified
Total nitrogen content <0.002%
Arsenic salt ≤0.00002
Phosphate <0.001%
Barium <0.001%
Sulfate ≤0.005 %
Sodium ≤ 0.10 %
Magnesium ≤ 0.002 %
Iron ≤ 0.0003 %
Calcium ≤ 0.002 %
Heavy metal ≤ 0.0005 %
Purity ≥ 99.5％