Description
Sodium hydrogen sulphite ; sodium acid sulphite
| CAS | 7631-90-5 |
| Molecular Formula | NaHSO3 |
| Molecular Weight | 104.06 |
| Shelf Life | 60 Months |
| Physical Properties | |||
| Physical State at 20 °C | Solid | Colour | White crystalline |
| Odour | Slight odor of sulfur dioxide | Melting Point/ Freezing Point [°C] | 150°C |
| Density [g/cm3] | 1.48 | Solubility in Water [% weight] | Soluble in water |
| Specifications | |||
| Appearance | White to yellowish white crystalline or granular powder | Assay (As So2; Iodometric) | Min 58.0% |
| Chloride (Cl) | Max 0.05% | Heavy Metal (As Pb) | Max 0.001% |
| Insoluble Matter | Max 0.005% | Iron (Fe) | Max 0.003% |
| Solubility | Passes test | ||
| Dangerous Goods Information | |||
| UN Number | – | DG Class | – |
| Safety Information & Hazard Symbols | |
| Symbol | GHS05, GHS07 |
| Signal Word | Danger |
| Hazard Statement | H302-H318 |
| Precaution Statement | P280-P305 + P351 + P338 |















