Items | Standards | ||||
Appearance | White, odorless, hygroscopic powder | ||||
Assay (Dry Basis, %) | 99.0-101.0 | ||||
pH (1% Solution, 25℃) | 8.0- 9.5 | ||||
Formic acid, formates and other oxidizable (as formic acid) | ≤ 1.0 | ||||
Insoluble Matter (%) | ≤ 0.05 | ||||
Chlorides (Cl) | ≤ 350 mg/ kg | ||||
Alkalinity (as NaOH, %) | ≤ 0.2 | ||||
Phosphate (PO4) | ≤ 10 mg/ kg | ||||
Sulphate (SO4) | ≤ 50 mg/ kg | ||||
Iron (Fe) | ≤ 10 mg/ kg | ||||
Arsenic (As) | ≤ 3 mg/ kg | ||||
Lead (Pb) | ≤ 5 mg/ kg | ||||
Mercury | ≤ 1 mg/ kg | ||||
Heavy Metal (as Pb) | ≤ 10 mg/ kg | ||||
Potassium Salt | ≤ 0.025% |