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2-cis-Butene
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2-cis-Butene
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C4H8
2-cis-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
    162.6
    °C
    324.68 °F 435.75 K
  • Pressure
    42.255
    bar
    4.2255E6 pa 612.8567 lbf/in2 41.7024 Atm 4225.5 Kpa 3.1694E4 mmHg
  • Density
    238.12
    kg/m³
    14.8653 lb/ft³

Triple Point

  • Temperature
    - 138.85
    °C
    - 217.93 °F 134.3 K
  • Pressure
    2.72E-6
    bar
    2.72E-1 pa 3.945E-5 lbf/in2 2.6844E-6 Atm 2.72E-4 Kpa 2.0402E-3 mmHg
Pressure 1.013 bar
  • Melting point
    - 138.89
    °C
    - 218.002 °F 134.26 K
  • Latent heat of fusion (at melting point)
    130.278
    kJ/kg
    56.047 Btu/lb 31.1372 kcal/kg
  • Solid density
    /
Pressure 1.013 bar
  • Liquid density
    640.07
    kg/m³
    39.9582 lb/ft³
  • Boiling point
    3.72
    °C
    38.696 °F 276.87 K
  • Latent heat of vaporization (at boiling point)
    414.2
    kJ/kg
    178.1935 Btu/lb 98.9962 kcal/kg
Pressure1.013barTemperature
  • Compressibility factor Z
    /
    9.6503E-1
    9.6925E-1
  • Cp/Cv ratio γ
    /
    1.1388
    1.1319
  • Dynamic viscosity
    /
    7.7104E-5
    Po
    7.7104 µPa.s 7.7104E-6 PA.S 5.1812E-6 lb/ft/s
    7.9961E-5
    Po
    7.9961 µPa.s 7.9961E-6 PA.S 5.3731E-6 lb/ft/s
  • Gas density at boiling point
    2.574
    kg/m³
    1.6069E-1 lb/ft³
    2.574
    kg/m³
    1.6069E-1 lb/ft³
    2.574
    kg/m³
    1.6069E-1 lb/ft³
  • Gas density
    /
    2.4583
    kg/m³
    1.5347E-1 lb/ft³
    2.3655
    kg/m³
    1.4767E-1 lb/ft³
  • Heat capacity at constant pressure Cp
    /
    1.4652
    kJ/(kg.K)
    3.5019E-1 BTU/lb∙°F 1465.2 J/kg∙K 3.5019E-1 kcal/kg∙K
    1.4918
    kJ/(kg.K)
    3.5655E-1 BTU/lb∙°F 1491.8 J/kg∙K 3.5655E-1 kcal/kg∙K
  • Heat capacity at constant volume Cv
    /
    1.2866
    kJ/(kg.K)
    3.0751E-1 BTU/lb∙°F 1286.6 J/kg∙K 3.0751E-1 kcal/kg∙K
    1.3179
    kJ/(kg.K)
    3.1499E-1 BTU/lb∙°F 1317.9 J/kg∙K 3.1499E-1 kcal/kg∙K
  • Liquid (at boiling point)/gas equivalent
    /
    260.37
    mol/mol
    270.59
    mol/mol
  • Solubility in water
    /
    /
    /
  • Specific gravity
    1.93
    1.93
    1.93
  • Specific volume
    /
    4.068E-1
    m³/kg
    6.5163 ft³/lb
    4.228E-1
    m³/kg
    6.7726 ft³/lb
  • Thermal conductivity
    /
    14.841
    mW/m∙K
    8.5807E-3 Btu/ft/h/°F 1.277E-1 cal/hour∙cm∙°C 3.5471E-5 cal/s∙cm∙°C 1.4841E-2 W/(m∙K)
    15.775
    mW/m∙K
    9.1207E-3 Btu/ft/h/°F 1.3573E-1 cal/hour∙cm∙°C 3.7703E-5 cal/s∙cm∙°C 1.5775E-2 W/(m∙K)
  • Vapor pressure
    8.805E-1
    bar
    8.805E4 pa 12.7706 lbf/in2 8.6899E-1 Atm 88.05 Kpa 660.4311 mmHg
    1.5335
    bar
    1.5335E5 pa 22.2415 lbf/in2 1.5134 Atm 153.35 Kpa 1150.2228 mmHg
    2.143
    bar
    2.143E5 pa 31.0816 lbf/in2 2.115 Atm 214.3 Kpa 1607.3866 mmHg
C4H8
2-cis-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
2-cis-Butene

Applications

Examples of uses of this molecule in Industry and Healthcare

Chemicals

2-cis-Butene have end uses in the production of butyl rubber. 2-cis-Butene is used as feedstock for the production of propylene or mixed octenes.

Chemicals
C4H8
2-cis-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
      325
      °C
      617 °F 598.15 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
  • US (according to NFPA for Limits and ASTM E659 for autoignition temperature)

    • Auto-ignition temperature
      325
      °C
      617 °F 598.15 K
    • Flash point
      /
    • Lower flammability limit
      1.7
      vol/%
      1.7E4 ppm 1.7E4 ppm 1.7E-2 vol/vol
    • Upper flammability limit
      9
      vol/%
      9.E4 ppm 9.E4 ppm 0.09 vol/vol

Odor

Slightly aromatic

Metals

  • Aluminium
    Satisfactory
  • Brass
    Satisfactory
  • 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
2-cis-Butene

Learn More

General information

More information

2-cis-Butene is an acyclic alkene with four carbon atoms. It is a petrochemical, produced by the catalytic cracking of crude oil or the dimerization of ethylene. Its main uses are in the production of gasoline (petrol) and butadiene, although some 2-butene is also used to produce the solvent butanone.