Shouguang Xintian Chemical Co., Ltd.
Anhydrous sodium sulfite
Industrial grade anhydrous sodium sulfite
| Item | Quality Standard | ||
| HG/T 2967-2010 | |||
| Premium goods (medical grade) | Top grade | First grade | |
| Sodium sulfite (Na2SO3) content,% | ≥98.5 | ≥97.0 | ≥96.0 |
| Iron (Fe) content,% | ≤0.0006 | ≤0.003 | ≤0.005 |
| Water insoluble matter content,% | ≤0.003 | ≤0.02 | ≤0.03 |
| Free alkali ( calculated as Na2CO3) content,% | ≤0.10 | ≤0.40 | ≤0.80 |
| Sulfate (as Na2SO4) content,% | ≤2.5 | — | — |
| Chloride (as NaCl) content,% | ≤0.10 | — | — |
Food grade anhydrous sodium sulfite
| Item | National standard | Corporate current value |
| GB1894-2005 | ||
| Mass fraction of sodium sulfite (Na2SO3)/% | ≥96.5 | ≥97.5 |
| Mass fraction of iron (Fe)/% | ≤0.01 | ≤0.001 |
| Mass fraction of free alkali ( calculated as Na2CO3)/% | ≤0.60 | ≤0.2 |
| Mass fraction of heavy metal (calculated as Pb)/% | ≤0.001 | ≤0.0005 |
| Mass fraction of arsenic (As content)/% | ≤0.0002 | ≤0.0002 |
| Clarity | pass experiments | pass experiments |
Molecular formula: Na2SO3
Molecular weight: 126.04
Appearance: white crystalline powder
Packaging: Polypropylene woven bag for external use, paper-plastic composite bag, kraft paper bag, lined with polyethylene plastic bag.
Net weight: 25, 50, 1000 kg/bag or customized according to customer requirements
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