| Article No. | 06023 |
| Purity | 95% |
| Molecular Formula | Na2SO3 |
| H.S. Code | 2832.1090 |
| Grade | Extra Pure |
| CAS No. | 7757-83-7 |
| Molecular Weight | 126.04 |
| Shelf Life | 60 Months |
Symbol:
| Physical state at 20 °C | Solid | Colour | White crystalline | ||||
| Odour | Odorless | pH value | 9.0 - 10.5 at 126 g/l at 25 °C | ||||
| Melting point/ Freezing point [°C] | 500°C | Density [g/cm3] | 2.63 | ||||
| Solubility in water [% weight] | 126 g/l at 20 °C - completely soluble | ||||||
| Appearance | White crystalline powder | Assay (iodometric) | 95 - 100.5% |
| SO2 | Min 48% | Identity | Passes test |
| Appearance of solution | Passes test | Thiosulphate (S2O3) | Max 0.04% |
| Arsenic (As) | Max 0.0002% | Heavy metal (as Pb) | Max 0.001% |
| Iron (Fe) | Max 0.001% | Copper (Cu) | Max 0.0005% |
| Selenium (Se) | Max 0.001% | Zinc (Zn) | Max 0.0025% |
EN 