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Isopentane
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Isopentane
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C5H12
Isopentane

Physical Properties

Under solid (grey), liquid (blue) and vapor states (white) along the equilibrium curves

  • General properties
  • Solid phase
  • Liquid Phase
  • Gas Phase
(P)
log(P)
Download
  • Molecular weight
    72.149
    g/mol
  • Content in air
    /

Critical Point

  • Temperature
    187.2
    °C
    368.96 °F 460.35 K
  • Pressure
    33.78
    bar
    3.378E6 pa 489.9373 lbf/in2 33.3383 Atm 3378 Kpa 2.5337E4 mmHg
  • Density
    234.172
    kg/m³
    14.6188 lb/ft³

Triple Point

  • Temperature
    - 160.5
    °C
    - 256.9 °F 112.65 K
  • Pressure
    9.E-10
    bar
    9.E-5 pa 1.3053E-8 lbf/in2 8.8823E-10 Atm 9.E-8 Kpa 6.7506E-7 mmHg
Pressure 1.013 bar
  • Melting point
    - 159.9
    °C
    - 255.82 °F 113.25 K
  • Latent heat of fusion (at melting point)
    71.38
    kJ/kg
    30.7085 Btu/lb 17.0602 kcal/kg
  • Solid density
    /
Pressure 1.013 bar
  • Liquid density
    612.076
    kg/m³
    38.2106 lb/ft³
  • Boiling point
    27.83
    °C
    82.094 °F 300.98 K
  • Latent heat of vaporization (at boiling point)
    343.284
    kJ/kg
    147.6846 Btu/lb 82.0468 kcal/kg
Pressure1.013barTemperature
  • Compressibility factor Z
    /
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  • Cp/Cv ratio γ
    /
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  • Dynamic viscosity
    /
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  • Gas density at boiling point
    3.056
    kg/m³
    1.9078E-1 lb/ft³
    3.056
    kg/m³
    1.9078E-1 lb/ft³
    3.056
    kg/m³
    1.9078E-1 lb/ft³
  • Gas density
    /
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  • Heat capacity at constant pressure Cp
    /
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  • Heat capacity at constant volume Cv
    /
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  • Liquid (at boiling point)/gas equivalent
    /
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  • Solubility in water
    /
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  • Specific gravity
    /
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  • Specific volume
    /
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  • Thermal conductivity
    /
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  • Vapor pressure
    3.455E-1
    bar
    3.455E4 pa 5.0111 lbf/in2 3.4098E-1 Atm 34.55 Kpa 259.147 mmHg
    6.353E-1
    bar
    6.353E4 pa 9.2142 lbf/in2 6.2699E-1 Atm 63.53 Kpa 476.5155 mmHg
    9.171E-1
    bar
    9.171E4 pa 13.3014 lbf/in2 9.0511E-1 Atm 91.71 Kpa 687.8835 mmHg
C5H12
Isopentane

Liquid / Gas Volumes

Calculate a liquid or gas volume or a mass

Liquid Phase

At boiling point at 1.013 bar

m3(Volume)
kg(Mass)

Gas Phase

at 1.013 bar and boiling point

m3(Volume)
kg(Mass)
C5H12
Isopentane

Applications

Examples of uses of this molecule in Industry and Healthcare

C5H12
Isopentane

Safety

Information to safely use this molecule

  • Major hazards
  • Material compatibility
  • GHS02
    Flammable
  • GHS08
    Serious health hazard
  • GHS09
    Hazardous to the environment

Autoignition Temperature in Air at Patm and Flammability Limits in Air at Patm and 293.15 K (except if the temperature is indicated)

  • Europe (according to EN1839 for Limits and EN 14522 for autoignition temperature)

    • Auto-ignition temperature
      420
      °C
      788 °F 693.15 K
    • Flash point
      /
    • Lower flammability limit
      1.3
      vol/%
      1.3E4 ppm 1.3E4 ppm 1.3E-2 vol/vol
    • Upper flammability limit
      7.6
      vol/%
      7.6E4 ppm 7.6E4 ppm 7.6E-2 vol/vol
  • US (according to NFPA for Limits and ASTM E659 for autoignition temperature)

    • Auto-ignition temperature
      420
      °C
      788 °F 693.15 K
    • Flash point
      /
    • Lower flammability limit
      1.4
      vol/%
      1.4E4 ppm 1.4E4 ppm 1.4E-2 vol/vol
    • Upper flammability limit
      7.6
      vol/%
      7.6E4 ppm 7.6E4 ppm 7.6E-2 vol/vol

Odor

Gasoline

Metals

  • Aluminium
    Satisfactory
  • Brass
    Satisfactory
  • Monel
    Satisfactory
  • Copper
    Satisfactory
  • Ferritic Steel
    no data
  • Stainless steel
    Satisfactory
  • Zinc
    Satisfactory
  • Titanium
    no data

Plastics

  • Polytetrafluoroethylene
    Satisfactory
  • Polychlorotrifluoroethylene
    Satisfactory
  • Polyvinylidene fluoride
    Satisfactory
  • Polyvinyl chloride
    Satisfactory
  • Ethylene tetrafluoroethylene
    Satisfactory
  • Polycarbonate
    Satisfactory
  • Polyamide
    no data
  • Polypropylene
    no data

Elastomers

  • Buthyl (isobutene- isoprene) rubber
    no data
  • Nitrile rubber
    no data
  • Chloroprene
    no data
  • Chlorofluorocarbons
    no data
  • Silicon
    no data
  • Perfluoroelastomers
    Satisfactory
  • Fluoroelastomers
    Satisfactory
  • Nitrile rubber
    Satisfactory
  • Neoprene
    Satisfactory
  • Polyurethane
    Satisfactory
  • Ethylene-Propylene
    no data

Lubricants

  • Hydrocarbon based lubricant
    no data
  • Fluorocarbon based lubricant
    no data

Materials compatibility

Recommendations : Air Liquide has gathered data on the compatibility of gases with materials to assist you in evaluating which materials to use for a gas system. Although the information has been compiled from what Air Liquide believes are reliable sources (International Standards: Compatibility of cylinder and valve materials with gas content; Part 1- Metallic materials: ISO11114-1 (March 2012), Part 2 - Non-metallic materials: ISO11114-2 (April 2013), it must be used with extreme caution and engineering judgement. No raw data such as these can cover all conditions of concentration, temperature, humidity, impurities and aeration. It is therefore recommended that this table is only used to identify possible materials for applications at high pressure and ambient temperature. Extensive investigation and testing under the specific conditions of use need to be carried out to validate a material selection for a given application. Contact the regional Air Liquide team for expertise service.

C5H12
Isopentane

Learn More

General information

More information

Isopentane forms less than 1 % of natural gas.