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Ethane
Ethan Skelett.svg
Ethan Lewis.svg
Ethane-A-3D-balls.png
Ethane-3D-vdW.png
Identifiers
CAS number 74-84-0
PubChem 6324
EC number 200-814-8
MeSH Ethane
ChEBI CHEBI:42266
RTECS number KH3800000
SMILES CC
Beilstein Reference 1730716
Gmelin Reference 212
Properties
Molecular formula C2H6
Molar mass 30.07 g mol-1
Appearance Colorless gas
Odor Odorless
Density
  • 1.3562 kg/m−3 (gas at 0 °C)

544.0 kg/m−3 (liquid at -88,5 °C)
206 kg/m−3 (at critical point 305.322 K)

Melting point

-183 °C, 90.4 K, -297 °F

Boiling point

-89 °C, 184.6 K, -127 °F

Solubility in water 56.8 mg L−1
Vapor pressure 3.8453 MPa (at 21.1 °C)
kH 19 nmol Pa−1 kg−1
Acidity (pKa) 50
Basicity (pKb) -36
-37.37·10−6 cm3/mol
Thermochemistry
Std enthalpy of
formation ΔfHo298
−84 kJ mol−1
Std enthalpy of
combustion ΔcHo298
−1561.0–−1560.4 kJ mol−1
Specific heat capacity, C 52.49 J K−1 mol−1
Hazards
NFPA 704

NFPA 704.svg

4
1
0
 
Explosive limits 2.9–13%
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)

Ethane is an organic chemical compound with chemical formula C2H6.

At standard temperature and pressure, ethane is a colourless, odorless gas. It is isolated from natural gas, and as a byproduct of petroleum refining.

Its main use is in the chemical industry, to make ethylene by steam cracking.

At room temperature, the gas is flammable, and it explodes when mixed with air. When ethane is liquid, touching it causes a very serious frostbite.


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