|
Item |
Quality standard |
||
|
Top-grade |
First grade |
Qualified product |
|
|
sodium sulfite (Na2SO3),% |
≥97.0 |
≥96.0 |
≥93.0 |
|
Fe,% |
≤0.003 |
≤0.005 |
≤0.02 |
|
Water-Insoluble |
≤0.02 |
≤0.03 |
≤0.05 |
|
Free alkali(As content Na2CO3),% |
≤0.10 |
≤0.40 |
≤0.80 |
|
Sulfate(As content Na2SO4),% |
≤2.5 |
- |
- |
|
Chloride(NaCl), content % |
≤0.10 |
- |
- |
Packing: polypropylene weaving bag lined with polyethylene plastic bag, paper plastic compound bag, etc.
Net wt.: 25/50/1000kg/bag or upon clients' request