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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 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
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)
C5H12
Neopentane

Applications

Examples of uses of this molecule in Industry and Healthcare

C5H12
Neopentane

Safety

Information to safely use this molecule

  • Major hazards
  • Material compatibility
  • 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
    no data
  • Chloroprene
    no data
  • Chlorofluorocarbons
    no data
  • Silicon
    no data
  • Perfluoroelastomers
    no data
  • Fluoroelastomers
    no data
  • Nitrile rubber
    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.

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.