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1-Butene
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1-Butene
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C4H8
1-Butene

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
    56.106
    g/mol
  • Content in air
    /

Critical Point

  • Temperature
    146.14
    °C
    295.052 °F 419.29 K
  • Pressure
    40.051
    bar
    4.0051E6 pa 580.8904 lbf/in2 39.5273 Atm 4005.1 Kpa 3.0041E4 mmHg
  • Density
    237.89
    kg/m³
    14.851 lb/ft³

Triple Point

  • Temperature
    - 185.35
    °C
    - 301.63 °F 87.8 K
  • Pressure
    /
Pressure 1.013 bar
  • Melting point
    - 185.35
    °C
    - 301.63 °F 87.8 K
  • Latent heat of fusion (at melting point)
    68.584
    kJ/kg
    29.5056 Btu/lb 16.392 kcal/kg
  • Solid density
    /
Pressure 1.013 bar
  • Liquid density
    625.63
    kg/m³
    39.0567 lb/ft³
  • Boiling point
    - 6.31
    °C
    20.642 °F 266.84 K
  • Latent heat of vaporization (at boiling point)
    392.23
    kJ/kg
    168.7417 Btu/lb 93.7452 kcal/kg
Pressure1.013barTemperature
  • Compressibility factor Z
    9.6146E-1
    9.6845E-1
    9.7213E-1
  • Cp/Cv ratio γ
    1.1389
    1.1284
    1.1225
  • Dynamic viscosity
    7.4354E-5
    Po
    7.4354 µPa.s 7.4354E-6 PA.S 4.9964E-6 lb/ft/s
    7.8728E-5
    Po
    7.8728 µPa.s 7.8728E-6 PA.S 5.2903E-6 lb/ft/s
    8.1625E-5
    Po
    8.1625 µPa.s 8.1625E-6 PA.S 5.485E-6 lb/ft/s
  • Gas density at boiling point
    2.675
    kg/m³
    1.6699E-1 lb/ft³
    2.675
    kg/m³
    1.6699E-1 lb/ft³
    2.675
    kg/m³
    1.6699E-1 lb/ft³
  • Gas density
    2.6029
    kg/m³
    1.6249E-1 lb/ft³
    2.4496
    kg/m³
    1.5292E-1 lb/ft³
    2.3584
    kg/m³
    1.4723E-1 lb/ft³
  • Heat capacity at constant pressure Cp
    1.4905
    kJ/(kg.K)
    3.5624E-1 BTU/lb∙°F 1490.5 J/kg∙K 3.5624E-1 kcal/kg∙K
    1.5305
    kJ/(kg.K)
    3.658E-1 BTU/lb∙°F 1530.5 J/kg∙K 3.658E-1 kcal/kg∙K
    1.5606
    kJ/(kg.K)
    3.7299E-1 BTU/lb∙°F 1560.6 J/kg∙K 3.7299E-1 kcal/kg∙K
  • Heat capacity at constant volume Cv
    1.3087
    kJ/(kg.K)
    3.1279E-1 BTU/lb∙°F 1308.7 J/kg∙K 3.1279E-1 kcal/kg∙K
    1.3564
    kJ/(kg.K)
    3.2419E-1 BTU/lb∙°F 1356.4 J/kg∙K 3.2419E-1 kcal/kg∙K
    1.3902
    kJ/(kg.K)
    3.3227E-1 BTU/lb∙°F 1390.2 J/kg∙K 3.3227E-1 kcal/kg∙K
  • Liquid (at boiling point)/gas equivalent
    240.36
    mol/mol
    255.4
    mol/mol
    265.28
    mol/mol
  • Solubility in water
    /
    /
    9.41E-2
    mol/mol
  • Specific gravity
    1.93
    1.93
    1.93
  • Specific volume
    3.842E-1
    m³/kg
    6.1543 ft³/lb
    4.082E-1
    m³/kg
    6.5387 ft³/lb
    4.24E-1
    m³/kg
    6.7918 ft³/lb
  • Thermal conductivity
    14.505
    mW/m∙K
    8.3864E-3 Btu/ft/h/°F 1.248E-1 cal/hour∙cm∙°C 3.4668E-5 cal/s∙cm∙°C 1.4505E-2 W/(m∙K)
    15.939
    mW/m∙K
    9.2155E-3 Btu/ft/h/°F 1.3714E-1 cal/hour∙cm∙°C 3.8095E-5 cal/s∙cm∙°C 1.5939E-2 W/(m∙K)
    16.934
    mW/m∙K
    9.7908E-3 Btu/ft/h/°F 1.457E-1 cal/hour∙cm∙°C 4.0473E-5 cal/s∙cm∙°C 1.6934E-2 W/(m∙K)
  • Vapor pressure
    1.2912
    bar
    1.2912E5 pa 18.7273 lbf/in2 1.2743 Atm 129.12 Kpa 968.4823 mmHg
    2.1976
    bar
    2.1976E5 pa 31.8735 lbf/in2 2.1689 Atm 219.76 Kpa 1648.3401 mmHg
    3.026
    bar
    3.026E5 pa 43.8884 lbf/in2 2.9864 Atm 302.6 Kpa 2269.6929 mmHg
C4H8
1-Butene

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)
C4H8
1-Butene

Applications

Examples of uses of this molecule in Industry and Healthcare

Chemicals

1-Butene is used as a co-monomer for the production of high density (HDPE) and linear low density (LLDPE) polyethylene products and for the manufacture of polybutylene. 1-Butene is also used as feedstock for the production of 1,2-butylene oxide, methylethylketone (MEK), maleic anhydride and n-butyl derivatives. Butene-1 has good solvent properties.

Chemicals
C4H8
1-Butene

Safety

Information to safely use this molecule

  • Major hazards
  • Material compatibility
  • GHS02
    Flammable

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
      360
      °C
      680 °F 633.15 K
    • Flash point
      /
    • Lower flammability limit
      1.5
      vol/%
      1.5E4 ppm 1.5E4 ppm 1.5E-2 vol/vol
    • Upper flammability limit
      10.6
      vol/%
      1.06E5 ppm 1.06E5 ppm 1.06E-1 vol/vol
  • US (according to NFPA for Limits and ASTM E659 for autoignition temperature)

    • Auto-ignition temperature
      385
      °C
      725 °F 658.15 K
    • Flash point
      /
    • Lower flammability limit
      1.6
      vol/%
      1.6E4 ppm 1.6E4 ppm 1.6E-2 vol/vol
    • Upper flammability limit
      10
      vol/%
      10.E4 ppm 10.E4 ppm 0.1 vol/vol

Odor

Slightly aromatic

Metals

  • Aluminium
    Satisfactory
  • Brass
    Not recommended
  • Monel
    Satisfactory
  • Copper
    Satisfactory
  • Ferritic Steel
    Satisfactory
  • Stainless steel
    Satisfactory
  • Zinc
    Satisfactory
  • Titanium
    no data

Plastics

  • Polytetrafluoroethylene
    Satisfactory
  • Polychlorotrifluoroethylene
    Satisfactory
  • Polyvinylidene fluoride
    Satisfactory
  • Polyvinyl chloride
    Satisfactory
  • Ethylene tetrafluoroethylene
    Satisfactory
  • Polycarbonate
    Not recommended
  • Polyamide
    Satisfactory
  • Polypropylene
    Satisfactory

Elastomers

  • Buthyl (isobutene- isoprene) rubber
    Not recommended
    significant swelling and modification of the properties of the material
  • Nitrile rubber
    Satisfactory
  • Chloroprene
    Not recommended
    significant swelling
  • Chlorofluorocarbons
    Satisfactory
  • Silicon
    Not recommended
    significant swelling and modification of the properties of the material
  • Perfluoroelastomers
    Satisfactory
  • Fluoroelastomers
    Satisfactory
  • Nitrile rubber
    Satisfactory
  • Neoprene
    Satisfactory
  • Polyurethane
    Satisfactory
  • Ethylene-Propylene
    Not recommended
    significant swelling and modification of the properties of the material

Lubricants

  • Hydrocarbon based lubricant
    Not recommended
    significant loss of mass
  • Fluorocarbon based lubricant
    Satisfactory

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.

C4H8
1-Butene

Learn More

General information

More information

1-Butene, also known as butylene, is an alkene with the formula C4H8. It is a gas at room temperature and pressure, but can be liquefied by lowering the temperature or raising the pressure on it, in a manner similar to pressurised butane. This gas is colourless, highly flammable with no distinct odour. Although not naturally present in petroleum in high percentages, it can be produced from petrochemicals or by catalytic cracking of petroleum.