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      Neopentane
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      Neopentane
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      C5H12
      Neopentane

      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 dry air
        /

      Critical Point

      • Temperature
        160.59
        °C
         321.062 °F 433.74 K
      • Pressure
        31.96
        bar
         3.196E6 pa 463.5404 lbf/in2 31.5421 Atm 3196 Kpa 2.3972E4 mmHg
      • Density
        235.927
        kg/m³
         14.7284 lb/ft³

      Triple Point

      • Temperature
        - 16.55
        °C
         2.21 °F 256.6 K
      • Pressure
        3.54E-1
        bar
         3.54E4 pa 5.1343 lbf/in2 3.4937E-1 Atm 35.4 Kpa 265.5226 mmHg
      Pressure 1.013 bar
      • Melting point
        - 16.55
        °C
         2.21 °F 256.6 K
      • Latent heat of fusion (at melting point)
        29.744
        kJ/kg
         12.7962 Btu/lb 7.109 kcal/kg
      • Solid density
        /
      Pressure 1.013 bar
      • Liquid density
        601.172
        kg/m³
         37.5299 lb/ft³
      • Boiling point
        9.5
        °C
         49.1 °F 282.65 K
      • Latent heat of vaporization (at boiling point)
        315.692
        kJ/kg
         135.8142 Btu/lb 75.4522 kcal/kg
      Pressure1.013barTemperature
      • Compressibility factor Z
        /
        9.5839E-1
        9.6308E-1
      • Cp/Cv ratio γ
        /
        1.0919
        1.0869
      • Dynamic viscosity
        /
        7.0232E-5
        Po
         7.0232 µPa.s 7.0232E-6 PA.S 4.7194E-6 lb/ft/s
        7.2589E-5
        Po
         7.2589 µPa.s 7.2589E-6 PA.S 4.8778E-6 lb/ft/s
      • Gas density at boiling point
        3.255
        kg/m³
         2.032E-1 lb/ft³
        3.255
        kg/m³
         2.032E-1 lb/ft³
        3.255
        kg/m³
         2.032E-1 lb/ft³
      • Gas density
        /
        3.1839
        kg/m³
         1.9876E-1 lb/ft³
        3.0621
        kg/m³
         1.9116E-1 lb/ft³
      • Heat capacity at constant pressure Cp
        /
        1.6695
        kJ/(kg.K)
         3.9902E-1 BTU/lb∙°F 1669.5 J/kg∙K 3.9902E-1 kcal/kg∙K
        1.7147
        kJ/(kg.K)
         4.0982E-1 BTU/lb∙°F 1714.7 J/kg∙K 4.0982E-1 kcal/kg∙K
      • Heat capacity at constant volume Cv
        /
        1.529
        kJ/(kg.K)
         3.6544E-1 BTU/lb∙°F 1529 J/kg∙K 3.6544E-1 kcal/kg∙K
        1.5777
        kJ/(kg.K)
         3.7708E-1 BTU/lb∙°F 1577.7 J/kg∙K 3.7708E-1 kcal/kg∙K
      • Liquid (at boiling point)/gas equivalent
        /
        188.87
        mol/mol
        196.38
        mol/mol
      • Solubility in water
        /
        /
        /
      • Specific gravity
        /
        /
        /
      • Specific volume
        /
        3.141E-1
        m³/kg
         5.0314 ft³/lb
        3.266E-1
        m³/kg
         5.2316 ft³/lb
      • Thermal conductivity
        /
        15.525
        mW/m∙K
         8.9762E-3 Btu/ft/h/°F 1.3358E-1 cal/hour∙cm∙°C 3.7106E-5 cal/s∙cm∙°C 1.5525E-2 W/(m∙K)
        16.528
        mW/m∙K
         9.5561E-3 Btu/ft/h/°F 1.4221E-1 cal/hour∙cm∙°C 3.9503E-5 cal/s∙cm∙°C 1.6528E-2 W/(m∙K)
      • Vapor pressure
        7.117E-1
        bar
         7.117E4 pa 10.3223 lbf/in2 7.0239E-1 Atm 71.17 Kpa 533.8204 mmHg
        1.231
        bar
         1.231E5 pa 17.8541 lbf/in2 1.2149 Atm 123.1 Kpa 923.3285 mmHg
        1.715
        bar
         1.715E5 pa 24.874 lbf/in2 1.6926 Atm 171.5 Kpa 1286.3593 mmHg
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      C5H12
      Neopentane

      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)
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      C5H12
      Neopentane

      Applications

      Examples of uses of this molecule in Industry and Healthcare

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      C5H12
      Neopentane

      Safety & Compatibility

      Information to safely use this molecule

      • Major hazards
      • Material compatibility
      Safety
      • GHS02
        Flammable
      • 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
          450
          °C
           842 °F 723.15 K
        • Flash point
          /
        • Lower flammability limit
          1.3
          vol/%
           1.3E4 ppm 1.3E4 ppm 1.3E-2 vol/vol
        • Upper flammability limit
          7.5
          vol/%
           7.5E4 ppm 7.5E4 ppm 7.5E-2 vol/vol

      • US (according to NFPA for Limits and ASTM E659 for autoignition temperature)

        • Auto-ignition temperature
          450
          °C
           842 °F 723.15 K
        • Flash point
          /
        • Lower flammability limit
          1.4
          vol/%
           1.4E4 ppm 1.4E4 ppm 1.4E-2 vol/vol
        • Upper flammability limit
          7.5
          vol/%
           7.5E4 ppm 7.5E4 ppm 7.5E-2 vol/vol

      Metals

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

      Plastics

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

      Elastomers

      • Buthyl (isobutene- isoprene) rubber
        No data
      • Nitrile rubber NBR
        No data
      • Chloroprene
        No data
      • Chlorofluorocarbons
        No data
      • Silicon
        No data
      • Perfluoroelastomers
        No data
      • Fluoroelastomers
        No data
      • Neoprene
        No data
      • Polyurethane
        No data
      • 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.

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      C5H12
      Neopentane

      Learn More

      General information

      More information

      Neopentane, also called 2,2-dimethylpropane, is a double-branched-chain alkane with five carbon atoms. Neopentane is an extremely flammable gas at room temperature and pressure which can condense into a highly volatile liquid on a cold day, in an ice bath, or when compressed to a higher pressure.

      C5H12

      Neopentane