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| Other names[hide] Disodium sulfide | |
| Identifiers | |
|---|---|
| CASnumber | 1313-82-2 , 1313-84-4 (pentahydrate) 1313-84-4 (nonahydrate) |
| PubChem | 237873 |
| ECnumber | 215-211-5 |
| UNnumber | 1385(anhydrous) 1849 (hydrate) |
| RTECSnumber | WE1905000 |
| Jmol-3Dimages | Image1 |
| SMILES[show] | |
| InChI[show] | |
| Properties | |
| Molecular formula | Na2S |
| Molarmass | 78.0452g/mol (anhydrous) 240.18 g/mol (nonahydrate) |
| Appearance | colorless, hygroscopic solid |
| Odor | rotteneggs |
| Density | 1.856g/cm3 (anhydrous) 1.58 g/cm3 (pentahydrate) 1.43 g/cm3 (nonohydrate) |
| Meltingpoint | 1176°C (anhydrous) |
| Solubility inwater | 12.4g/100 mL (0 °C) 18.6 g/100 mL (20 °C) 39 g/100 mL (50 °C) |
| Solubility | insoluble in ether slightly soluble in alcohol |
| Structure | |
| Crystalstructure | Antifluorite (cubic), cF12 |
| Spacegroup | Fm3m, No. 225 |
| Coordination geometry | Tetrahedral (Na ); cubic (S2–) |
sodiumsulphide
