name of index \ class |
high-class |
first-class |
ammonium sulfamate≥% |
99.5 |
99.5 |
residue after burning≤% |
0.02 |
0.02 |
sulphate≤% |
0.05 |
0.05 |
heavy metal≤% |
0.0002 |
0.0002 |
Chloride ≤% |
0.002 |
0.002 |
Iron≤% |
0.000015 |
0.0001 |
PH value of 10 percent of water solution |
4-6 |
4-6 |
