Specifications :
| Properties | |
|---|---|
| Molecular formula | Na2S2O4 |
| Molar mass | 174.107 g/mol (anhydrous) 210.146 g/mol (dihydrate) |
| Appearance | white to grayish crystalline powder light-lemon colored flakes |
| Odor | faint sulfur odor |
| Density | 2.38 g/cm3 (anhydrous) 1.58 g/cm3 (dihydrate) |
| Melting point | 52°C (126°F; 325 K) |
| Boiling point | Decomposes |
| Solubility in water | 18.2 g/100 mL (anhydrous, 20 °C) 21.9 g/100 mL (Dihydrate, 20 °C) |
| Solubility | slightly soluble in alcohol |