Sodium Sulfite
| Sodium Sulfite | Q/S |
| Sodium Sulfite (Na2SO3) content,% | ≥98.5 |
| Iron (Fe) content,% | ≤0.0006 |
| Water Insoluble Matter content,% | ≤0.003 |
| Free Alkali ( calculated as Na2CO3) content,% | ≤0.10 |
| Sulfate (as Na2SO4) content,% | ≤2.5 |
| Chloride (as NaCl) content,% | ≤0.10 |
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