| Article No. | 06049 |
| Purity | 99% |
| Molecular Formula | Na2S2O3.5H2O |
| H.S. Code | 2832.3010 |
| Grade | Extra Pure |
| CAS No. | 10102-17-7 |
| Molecular Weight | 248.17 |
| Shelf Life | 60 Months |
Symbol:
| Physical state at 20 °C | Solid | Colour | Colorless crystals | ||||
| Odour | Odorless | pH value | 6 - 8.5 | ||||
| Melting point/ Freezing point [°C] | 48°C | Boiling point [°C] | > 100°C | ||||
| Density [g/cm3] | 1.75 | Solubility in water [% weight] | 79g/100 ml water @ 40C | ||||
| Appearance | Large, colourless crystals or coarse crystalline powder | Assay (iodometric) | 99-100.5% |
| Identity | Passes test | Appearance of solution | Dissolve 10.0 g in 50 ml of distilled water R, add 1 ml of 0.1 M sodium hydroxide and dilute to 100 ml with the same solvent. Clear & colourless |
| pH (10% solution in water) | 6.0 - 8.4 | Chloride (Cl) | Max 0.05% |
| Sulphate and Sulphite (as SO4) | Max 0.2% | Sulphide (S) | Passes test |
| Heavy metal (as Pb) | Max 0.001% | Calcium (Ca) | Passes test |
| Water | 32.0 - 37.0% |
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