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Propane
Propane-2D-Skeletal.svg
PropaneFull.png
Propane-3D-balls-B.png
Propane-3D-vdW-B.png
Identifiers
CAS number 74-98-6
PubChem 6334
EC number 200-827-9
KEGG D05625
ChEBI CHEBI:32879
RTECS number TX2275000
SMILES CCC
Beilstein Reference 1730718
Gmelin Reference 25044
Properties
Molecular formula C3H8
Molar mass 44.1 g mol-1
Appearance Colorless gas
Odor Odorless
Density 2.0098 kg/m3 (at 0 °C, 101.3 kPa)
Melting point

-188 °C, 85.5 K, -306 °F

Boiling point

Expression error: Unrecognized word "to". °C, 230.9 to 231.11 K, Expression error: Unrecognized word "to". °F

Solubility in water 47mgL−1 (at 0 °C)
log P 2.236
Vapor pressure 853.16 kPa (at 21.1 °C (70.0 °F))
kH 15 nmol Pa−1 kg−1
-40.5·10−6 cm3/mol
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, C 73.60 J K−1 mol−1
Hazards
NFPA 704

NFPA 704.svg

4
2
0
 
Explosive limits 2.37–9.5%
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 petroleum.


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