2-cis-Butene
- C4H8
- CAS Number 590-18-1
- UN1012 (gas)
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Liquid / Gas Volumes
Calculate the volume or mass of a quantity of gas or liquid
Liquid Phase
At boiling point at 1.013 bar
Gas Phase
In standard conditions (1.013 bar, 15°C)
Physical Properties
Molecule phase diagram showing the transition phases between solid, liquid and gas as a function of temperature and pressure
-
- Molar mass 56.106 g/mol
- Content in dry air /
-
Critical Point
- Temperature 162.35 °C
- Pressure 42.1 bar
- Density 239.77 kg/m³
-
Triple Point
- Temperature -138.85 °C
- Pressure 2.72E-6 bar
Pressure 1.013 bar
Latent heat of fusion (at melting point) | 130.278 kJ/kg |
Melting point | - 138.89 °C |
Pressure 1.013 bar
Boiling point | 3.72 °C |
Latent heat of vaporization (at boiling point) | 414.2 kJ/kg |
Liquid density (at boiling point) | 640.07 kg/m3 |
Gas density (at boiling point) | 2.574 kg/m3 |
Specific gravity | 1.93 |
Vapor pressure | 8.805E-1 bar |
Compressibility factor Z | 9.6503E-1 |
Cp/Cv ratio γ | 1.1388 |
Gas density | 2.4583 kg/m3 |
Gas/(liquid at boiling point) equivalent | 260.37 vol/vol |
Heat capacity Cp | 1.4652 kJ/(kg.K) |
Heat capacity Cv | 1.2866 kJ/(kg.K) |
Specific gravity | 1.93 |
Specific volume | 4.068E-1 m3/kg |
Thermal conductivity | 14.841 mW/(m.K) |
Vapor pressure | 1.5335 bar |
Viscosity | 7.7104E-5 Po |
Compressibility factor Z | 9.6925E-1 |
Cp/Cv ratio γ | 1.1319 |
Gas density | 2.3655 kg/m3 |
Gas/(liquid at boiling point) equivalent | 270.59 vol/vol |
Heat capacity Cp | 1.4918 kJ/(kg.K) |
Heat capacity Cv | 1.3179 kJ/(kg.K) |
Specific gravity | 1.93 |
Specific volume | 4.228E-1 m3/kg |
Thermal conductivity | 15.775 mW/(m.K) |
Vapor pressure | 2.143 bar |
Viscosity | 7.9961E-5 Po |
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.
Safety & Compatibility
GHS02
Flammable
Autoignition Temperature, Flammability Limits & Flash Point
Europe (according to EN1839 for Limits and EN 14522 for autoignition temperature)
Autoignition temperature (Chemsafe) | 325 °C |
Lower flammability limit (IEC 80079-20-1) | 1.6 vol% |
Upper flammability limit (IEC 80079-20-1) | 10 vol% |
US (according to ASTM E681 for Limits and ASTM E659 for autoignition temperature)
Autoignition temperature (NFPA 325) | 325 °C |
Lower flammability limit (NFPA 325) | 1.7 vol% |
Upper flammability limit (NFPA 325) | 9 vol% |
Odor
Slightly aromatic
Metals
Aluminium | Satisfactory |
Brass | Satisfactory |
Monel | No data |
Copper | No data |
Ferritic Steel | Satisfactory |
Stainless steel | Satisfactory |
Zinc | No data |
Titanium | No data |
Plastics
Polytetrafluoroethylene | Satisfactory |
Polychlorotrifluoroethylene | Satisfactory |
Polyvinylidene fluoride | Satisfactory |
Polyvinyl chloride |
Significant swelling, change of mechanical properties
Not recommended
|
Ethylene tetrafluoroethylene | No data |
Polycarbonate | No data |
Polyamide | Satisfactory |
Polypropylene | Satisfactory |
Elastomers
Butyl (isobutene- isoprene) rubber |
Significant swelling and modification of the properties of the material
Not recommended
|
Nitrile rubber | Satisfactory |
Chloroprene |
Significant swelling
Not recommended
|
Chlorofluorocarbons | No data |
Silicone |
Significant swelling and modification of the properties of the material
Not recommended
|
Perfluoroelastomers | Satisfactory |
Fluoroelastomers | Satisfactory |
Neoprene | No data |
Polyurethane |
Significant swelling, change of mechanical properties
Not recommended
|
Ethylene-Propylene |
Significant swelling and modification of the properties of the material
Not recommended
|
Lubricants
Hydrocarbon based lubricant |
Significant loss of mass
Not recommended
|
Fluorocarbon based lubricant | Satisfactory |
Materials compatibility
Learn More
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.