Propane

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Propane
Propane-2D-Skeletal.svg
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IUPAC name Propane[1]
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 mg mL−1 (at 0 °C, 101.3 kPa)
Melting point

-188 °C, 85.5 K, -306 °F

Boiling point

-42--42 °C, 230.9-231.11 K, -44--44 °F

Solubility in water 40 mg L−1 (at 0 °C)
log P 2.236
Vapor pressure 853.16 kPa (at 21.1 °C)
kH 15 nmol Pa−1 kg−1
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
EU classification Flammable F+
EU Index 601-003-00-5
NFPA 704

NFPA 704.svg

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R-phrases R12
S-phrases Template:S2, Template:S16
Flash point −104 °C
Autoignition
temperature
540 °C
Explosive limits 2.37–9.5%
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)

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  1. "Propane – Compound Summary". PubChem Compound. USA: National Center for Biotechnology Information. 27 March 2005. Identification and Related Records. Retrieved 8 December 2011.