Ethylene oxide

chemical compound

Ethylene oxide, called oxirane by IUPAC, is an organic compound with the chemical formula C
2
H
4
O
.[5]

Ethylene oxide
Ethylene oxide.svg
Ethylene-oxide-from-xtal-3D-balls.png
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)
Abbreviations EO, EtO
ChEBI
ChemSpider
ECHA InfoCard 100.000.773
EC Number
  • 200-849-9
KEGG
MeSH Ethylene+Oxide
RTECS number
  • KX2450000
UNII
  • C1CO1
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]
1.3597 (589 nm)[1]
1.94 D
Thermochemistry
Std enthalpy of
formation
ΔfHo298
−52.6 kJ·mol−1[4]
Standard molar
entropy
So298
242.5 J·mol−1·K−1[4]
Specific heat capacity, C 47.9 J·mol−1·K−1[4]
Hazards
EU classification Flammable F+ Toxic T
Carc. Cat. 1
Main hazards Carcinogen
Extremely flammable
NFPA 704

NFPA 704.svg

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).
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Infobox references

ReferencesEdit

  1. 1.0 1.1 1.2 1.3 1.4 Haynes, p. 3.430
  2. 2.0 2.1 NIOSH Pocket Guide to Chemical Hazards. "#0275". National Institute for Occupational Safety and Health (NIOSH).
  3. Haynes, p. 3.576
  4. 4.0 4.1 4.2 Haynes, p. 5.22
  5. Rebsdat, Siegfried and Mayer, Dieter (2005) "Ethylene Oxide" in Ullmann's Encyclopedia of Industrial Chemistry. Wiley-VCH, Weinheim. doi:10.1002/14356007.a10_117.