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Executive standardHG/T2890-1997:
No. | Test item name | Specification |
1 | Content | ≥99.0% |
2 | Clarity | Qualified |
3 | Dilute sulphuric acid-insoluble substance | ≤0.01% |
4 | Free alkali | Qualified |
5 | Chloride(Cl) | ≤0.001% |
6 | Sulfur Compounds (Counted by SO4) | ≤0.01% |
7 | Nitrate(NO3) | ≤0.003% |
8 | Manganese (Mn) | ≤0.0005% |
9 | Ferrum(Fe) | ≤0.0005% |
10 | Arsenic (As) | ≤0.00005% |
11 | Plumbum(Pb) | ≤0.005% |
12 | Potassium perman-ganat (Counted by O) | ≤0.002% |
13 | Ammonium sulfide not sediment (Counted by sulphates) | ≤0.10% |
Manufacturing
