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Propane
Propane-2D-Skeletal.svg
PropaneFull.png
Propane-3D-balls-B.png
Propane-3D-vdW-B.png
Identifiers
CAS number74-98-6
PubChem6334
EC number200-827-9
KEGGD05625
ChEBICHEBI:32879
RTECS numberTX2275000
SMILESCCC
Beilstein Reference1730718
Gmelin Reference25044
Properties
Molecular formulaC3H8
Molar mass44.1 g mol-1
AppearanceColorless gas
OdorOdorless
Density2.0098 kg/m3 (at 0 °C, 101.3 kPa)
Melting point

-188 °C, 85.5 K, -306 °F

Boiling point
Solubility in water47 mg⋅L−1 (at 0 °C)
log P2.236
Vapor pressure853.16 kPa (at 21.1 °C (70.0 °F))
kH15 nmol⋅Pa−1⋅kg−1
−40.5 × 10−6 cm3/mol
Dipole moment0.083 D
Thermochemistry
Std enthalpy of
formation
ΔfHo298
−105.2–104.2 kJ⋅mol−1
Std enthalpy of
combustion
ΔcHo298
−2.2197–2.2187 MJ⋅mol−1
Specific heat capacity, C73.60 J⋅K−1⋅mol−1
Hazards
NFPA 704

NFPA 704.svg

4
2
0
 
Explosive limits2.37–9.5%
U.S. Permissible
exposure limit (PEL)
TWA 1000 ppm (1800 mg/m3)
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)

Propane is an organic compound with the chemical formula C3H8. It is an alkane with three carbon atoms. It is used in fuels.

It begins to burn very quickly. Its melting temperature is −187.7 °C; its boiling temperature is −42 °C; its density is 1.83 g/l.

Propane is extracted from natural gasoline or from petroleumview more...