Ethylene oxide
Ethylene oxide, called oxirane by IUPAC, is an organic compound with the chemical formula C
2H
4O.[5]
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| Names | |||
|---|---|---|---|
| Preferred IUPAC name
Oxirane | |||
| Systematic IUPAC name
Epoxyethane Oxacyclopropane | |||
| Other names
Ethylene oxide Dimethylene oxide 1,2-Epoxyethane [3]-crown-1 Epoxide | |||
| Identifiers | |||
3D model (JSmol) |
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| Abbreviations | EO, EtO | ||
| ChEBI | |||
| ChemSpider | |||
| ECHA InfoCard | 100.000.773 | ||
| EC Number |
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| KEGG | |||
| MeSH | Ethylene+Oxide | ||
PubChem CID |
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| RTECS number |
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| UNII | |||
CompTox Dashboard (EPA) |
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SMILES
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| Properties | |||
| C2H4O | |||
| Molar mass | 44.052 g·mol−1[1] | ||
| Appearance | Colorless gas | ||
| Odor | Ether-like | ||
| Density | 0.8821 g·cm−3[1] | ||
| Melting point | −112.46 °C (−170.43 °F; 160.69 K)[1] | ||
| Boiling point | 10.4 °C (50.7 °F; 283.5 K)[1] | ||
| Miscible | |||
| Vapor pressure | 1.46 atm (20 °C)[2] | ||
| −30.5·10−6 cm3/mol[3] | |||
Refractive index (nD) |
1.3597 (589 nm)[1] | ||
| 1.94 D | |||
| Thermochemistry | |||
| Std enthalpy of formation ΔfH |
−52.6 kJ·mol−1[4] | ||
| Standard molar entropy S |
242.5 J·mol−1·K−1[4] | ||
| Specific heat capacity, C | 47.9 J·mol−1·K−1[4] | ||
| Hazards | |||
| EU classification |  F+  TCarc. Cat. 1 | ||
| Main hazards | Carcinogen Extremely flammable | ||
| NFPA 704 |
4
3
3
| ||
| R-phrases | Template:R45, Template:R46, R12, R23, R36/37/38 | ||
| S-phrases | S53, S45 | ||
| Explosive limits | 3 to 100% | ||
| U.S. Permissible exposure limit (PEL) |
TWA 1 ppm 5 ppm [15-minute excursion][2] | ||
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |||
 verify (what is  ?) | |||
| Infobox references | |||
References
- Haynes, p. 3.430
- NIOSH Pocket Guide to Chemical Hazards. "#0275". National Institute for Occupational Safety and Health (NIOSH).
- Haynes, p. 3.576
- Haynes, p. 5.22
- Rebsdat, Siegfried and Mayer, Dieter (2005) "Ethylene Oxide" in Ullmann's Encyclopedia of Industrial Chemistry. Wiley-VCH, Weinheim. doi:10.1002/14356007.a10_117.
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