2-trans-Butene
- C4H8
- CAS Number 624-64-6
- 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 155.45 °C
- Pressure 41 bar
- Density 235.74 kg/m³
-
Triple Point
- Temperature -105.55 °C
- Pressure 7.45E-4 bar
Pressure 1.013 bar
| Latent heat of fusion (at melting point) | 173.913 kJ/kg |
| Melting point | - 105.53 °C |
Pressure 1.013 bar
| Boiling point | 0.88 °C |
| Latent heat of vaporization (at boiling point) | 405.19 kJ/kg |
| Liquid density (at boiling point) | 626.45 kg/m3 |
| Gas density (at boiling point) | 2.605 kg/m3 |
| Specific gravity | 1.93 |
| Vapor pressure | 9.814E-1 bar |
| Compressibility factor Z | 9.651E-1 |
| Cp/Cv ratio γ | 1.1268 |
| Gas density | 2.4587 kg/m3 |
| Heat capacity Cp | 1.5845 kJ/(kg.K) |
| Heat capacity Cv | 1.4062 kJ/(kg.K) |
| Specific gravity | 1.93 |
| Specific volume | 4.068E-1 m3/kg |
| Thermal conductivity | 16.135 mW/(m.K) |
| Vapor pressure | 1.688 bar |
| Viscosity | 7.7419E-5 Po |
| Compressibility factor Z | 9.693E-1 |
| Cp/Cv ratio γ | 1.1209 |
| Gas density | 2.3659 kg/m3 |
| Heat capacity Cp | 1.6105 kJ/(kg.K) |
| Heat capacity Cv | 1.4367 kJ/(kg.K) |
| Specific gravity | 1.93 |
| Specific volume | 4.228E-1 m3/kg |
| Thermal conductivity | 17.106 mW/(m.K) |
| Vapor pressure | 2.3428 bar |
| Viscosity | 8.028E-5 Po |
Applications
Examples of uses of this molecule in Industry and Healthcare
Chemicals
2-Butenes have end uses in the production of butyl rubber. They are also used as feedstock for the production of propylene or mixed octenes.
Safety & Compatibility
GHS02
Flammable
GHS04
Gas under pressure
Autoignition Temperature, Flammability Limits & Flash Point
Europe (according to EN1839 for Limits and EN 14522 for autoignition temperature)
| Autoignition temperature (Chemsafe) | 324 °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) | 324 °C |
| Lower flammability limit (NFPA 325) | 1.8 vol% |
| Upper flammability limit (NFPA 325) | 9.7 vol% |
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
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.