Ethylene oxide
Ethylene oxide, called oxirane by IUPAC, is an organic compound with the chemical formula C2H4O.[5]
Ethylene oxide | |
---|---|
Oxirane | |
Epoxyethane Oxacyclopropane | |
Other names | Ethylene oxide Dimethylene oxide 1,2-Epoxyethane [3]-crown-1 Epoxide |
Identifiers | |
Abbreviations | EO, EtO |
CAS number | |
PubChem | |
EC number | 200-849-9 |
KEGG | D03474 |
MeSH | |
ChEBI | CHEBI:27561 |
RTECS number | KX2450000 |
SMILES | C1CO1 |
Properties | |
Molecular formula | 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, 161 K, -170 °F |
Boiling point | |
Solubility in water | Miscible |
Vapor pressure | 1.46 atm (20 °C)[2] |
−30.5·10−6 cm3/mol[3] | |
Refractive index (nD) | 1.3597 (589 nm)[1] |
Dipole moment | 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 | ![]() ![]() Carc. Cat. 1 |
Main hazards | Carcinogen Extremely flammable |
NFPA 704 |
|
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 noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) |
Ethylene Oxide Media
References
- ↑ 1.0 1.1 1.2 Haynes, p. 3.430
- ↑ 2.0 2.1 NIOSH Pocket Guide to Chemical Hazards. "#0275". National Institute for Occupational Safety and Health (NIOSH).
- ↑ Haynes, p. 3.576
- ↑ 4.0 4.1 4.2 Haynes, p. 5.22
- ↑ Rebsdat, Siegfried and Mayer, Dieter (2005) "Ethylene Oxide" in Ullmann's Encyclopedia of Industrial Chemistry. Wiley-VCH, Weinheim. .