| Name: Sodium Sulfite anhydrous |
| Grade: Extra pure |
| Application: Synthesis, Redox |
| Synonyms: Hypo clear (photography), E221 |
| CAS Number: 7757-83-7 EC Number: 231-821-4 Molar Mass: 126.04 g/mol Chemical Formula: Na2SO3 |
| Download: Datasheet | CoA | SDS |
| Chemical formula: Na2SO3 | Molar Mass: 126.04 g/mol |
| Appearance: White solid | Density: 2.63 g/cm3 (20 °C) |
| Solub. in water: 495 g/l (40 °C) | Melting point: 500 °C |
| Boiling point: Decomposes | Flash point: N/A |
| Storage temp.: Below +30 °C | Cautions: Irritant |
| R: 36/37/38 | S: 50 |
| HS-No.: 28321000 | EC-Index-No.: 231-821-4 |
| Assay (by iodometry) | 95.0 – 100.5 | % | |
| Identification (Sulfate) | Conforms | ||
| Identification (Sodium) | Conforms | ||
| Limit of thiosulfates | ≤ | 0.5 | % |
| Color and clarity of solution | Conforms |
| Ordering code | 1 kg | 2.5 kg | 5 kg | 10 kg | 20 kg |
| P.E. | 415.06.01000.02 | 415.06.05000.02 | 415.06.10000.02 | ||
| Glass |
| Hazard Symbol |
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