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Butane (data page)

This page provides supplementary chemical data on n-butane.


Material Safety Data Sheet

The handling of this chemical may incur notable safety precautions. It is highly recommend that you seek the Material Safety Datasheet (MSDS) for this chemical from a reliable source such as SIRI, and follow its directions.

Structure and properties

Structure and properties
Index of refraction, nD  ?
Dielectric constant, εr  ? ε0 at ? °C
Symmetry group C2h
Bond strength  ?
Bond length  ?
Bond angle  ?
Magnetic susceptibility  ?
Surface tension 12.46 dyn/cm at 20°C
   P ≈ 225 kPa

Thermodynamic properties

Phase behavior
Triple point 134.6 K (–138.5 °C), 0.7 Pa
Critical point 425.1 K (152.0 °C), 3796.0 kPa
Std enthalpy change
of fusion
, ΔfusHo
4.66 kJ/mol
Std entropy change
of fusion, ΔfusSo
34.56 J/(mol·K)
Std enthalpy change
of vaporization
, ΔvapHo
22.44 kJ/mol
Std entropy change
of vaporization, ΔvapSo
82.30 J/(mol·K)
Solid properties
Std enthalpy change
of formation
, ΔfHosolid
 ? kJ/mol
Standard molar entropy,
 ? J/(mol K)
Heat capacity, cp  ? J/(mol K)
Liquid properties
Std enthalpy change
of formation
, ΔfHoliquid
 ? kJ/mol
Standard molar entropy,
229.7 J/(mol K)
Heat capacity, cp 132.42 J/(mol K) –262°C to –3°C
Gas properties
Std enthalpy change
of formation
, ΔfHogas
–125.6 kJ/mol
Standard molar entropy,
 ? J/(mol K)
Enthalpy of combustion, ΔcHo –2877.5 kJ/mol
Heat capacity, cp 98.49 J/(mol K) at 25°C
van der Waals' constants[1]
a = 1466.2 L2 kPa/mol2
b = 0.1226 liter per mole

Vapor pressure of liquid

P in mm Hg 1 10 40 100 400 760 1520 3800 7600 15200 30400 45600
T in °C –101.5 –77.8 –59.1 –44.2 –16.3 –0.5 18.8 50.0 79.5 116.0  —  —

n-Butane: Table data obtained from CRC Handbook of Chemistry and Physics 44th ed.


Spectral data

λmax  ? nm
Extinction coefficient, ε  ?
Major absorption bands  ? cm−1
Proton NMR  
Carbon-13 NMR  
Other NMR data  
Masses of
main fragments


  1. ^ Lange's Handbook of Chemistry 10th ed, pp 1522-1524
  • Multifunctional Green Alternative: Propane and Butane (properties). Seminck. Retrieved on 1 May 2007.

Except where noted otherwise, data relate to standard ambient temperature and pressure.

Disclaimer applies.

This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Butane_(data_page)". A list of authors is available in Wikipedia.
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