 |
Sodium
sulphite
Name |
Premium grade |
First grade |
Second grade |
Sodium sulphite %≥ |
97 |
96 |
93 |
Fe %≤ |
0.003 |
0.005 |
0.01 |
Water insoluble matter % |
0.02 |
0.03 |
0.05 |
Free alkali %≤ |
0.1 |
0.4 |
0.6 |
Sulfate radical %≤ |
2.5 |
- |
- |
Sodium chloride %≤ |
0.1 |
- |
- |
|
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