Chemical Product Library / Reference
Sodium Sulfite
Chemical identity, technical indicators, performance and application reference. Confirm specifications and regulatory suitability against supplier documentation.
Chemical identity
| English name | Sodium Sulfite |
|---|---|
| English synonyms | Sodium sulfite;Sodium sulphite;Na2SO3 |
| Chinese name | 亚硫酸钠 |
| Chinese synonyms | 无水亚硫酸钠;亚硫酸钠;硫氧粉 |
| Chemical category | Food Acids & Regulators |
| CAS No. | 7757-83-7 |
| EINECS No. | 231-821-4 |
| Molecular formula | Na2SO3 |
| Molecular weight | 126.04 |
PubChem structure images are reference depictions, not proof of composition, purity, grade, or regulatory status. Mixtures and polymers may not have a single representative structure.
Technical indicators
Na2SO3 content ≥98.0%; water-insoluble matter ≤0.02%; iron ≤0.002%; heavy metals (as Pb) ≤5 ppm
Performance characteristics
White crystalline powder, soluble in water, strong reducing and bleaching properties
Application scenarios
Food preservative and antioxidant, water treatment (oxygen scavenger), photographic chemicals, textile bleaching