Description Whiteor off-white powder
Content determination ≥99.5%
Clarity degree Clarity and Transparency
Dry weight loss ≤0.4%
Alkalinity pH 6.0~8.0
Chloride and bromide CI ≤0.02%
Iodate and iodine ≤0.002%
Water insoluble matter 0.002%
Reductive substances 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%