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| Names | |
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| IUPAC name
Carbon diselenide
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| Systematic IUPAC name
Methanediselenone | |
| Other names
Carbon selenide
Diselenoxomethane Methanediselone Carbon(IV) selenide | |
| Identifiers | |
3D model (JSmol)
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| ChemSpider | |
| ECHA InfoCard | 100.007.323 |
| EC Number |
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PubChem CID
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| UNII | |
CompTox Dashboard (EPA)
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| Properties | |
| CSe2 | |
| Molar mass | 169.953 g·mol−1 |
| Appearance | Yellow liquid |
| Density | 2.6824 g/cm3 |
| Melting point | −43.7 °C (−46.7 °F; 229.5 K) |
| Boiling point | 125.5 °C (257.9 °F; 398.6 K) |
| 0.054 g/(100 mL) | |
| Solubility | Soluble in CS2, toluene |
| 0 D | |
| Thermochemistry | |
Heat capacity (C)
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50.32 J/(mol·K) (gas) |
Std molar
entropy (S⦵298) |
263.2 J/(mol·K) (gas) |
Std enthalpy of
formation (ΔfH⦵298) |
219.2 kJ/mol (liquid) |
| Hazards | |
| Flash point | 30 °C (86 °F; 303 K) |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Carbon diselenide is an inorganic compound with the chemical formula CSe2. It is a yellow-orange oily liquid with pungent odor. It is the selenium analogue of carbon disulfide (CS2) and carbon dioxide (CO2). This light-sensitive compound is insoluble in water and soluble in organic solvents.