2-BUTENE
- CAS No.
- 624-64-6
- Chemical Name:
- 2-BUTENE
- Synonyms
- (E)-2-C4H8;t-butene-2;2-BUTYLENE;TR-2-BUTENE;(E)-2-Butene;trans-Butene;2-Butene,(E)-;(E)-But-2-ene;2-trans-Butene;(2E)-But-2-ene
- CBNumber:
- CB6449452
- Molecular Formula:
- C4H8
- Molecular Weight:
- 56.11
- MOL File:
- 624-64-6.mol
- Modify Date:
- 2023/5/6 17:15:45
| Melting point | −140 °C(lit.) |
|---|---|
| Boiling point | 1 °C(lit.) |
| Density | 0.5990 |
| vapor density | 2 (vs air) |
| vapor pressure | 2575 mm Hg ( 37.7 °C) |
| refractive index | 1.3932 |
| Flash point | <−30 °F |
| explosive limit | 9.7% |
| Merck | 1520 |
| BRN | 1718756 |
| Stability | Stable. Incompatible with strong oxidizing agents, peroxides, peroxyacids, aluminium tetrahydroborate. Extremely flammable. |
| InChIKey | IAQRGUVFOMOMEM-ONEGZZNKSA-N |
| CAS DataBase Reference | 624-64-6(CAS DataBase Reference) |
| EPA Substance Registry System | trans-2-Butene (624-64-6) |
SAFETY
Risk and Safety Statements
| Symbol(GHS) |  GHS02 |
|||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Signal word | Danger | |||||||||
| Hazard statements | H220-H280 | |||||||||
| Precautionary statements | P210-P410+P403 | |||||||||
| Hazard Codes | F,F+ | |||||||||
| Risk Statements | 12-11 | |||||||||
| Safety Statements | 9-16-33-38 | |||||||||
| RIDADR | UN 1012 2.1 | |||||||||
| WGK Germany | 3 | |||||||||
| RTECS | EM2932000 | |||||||||
| Autoignition Temperature | 615 °F | |||||||||
| DOT Classification | 2.1 (Flammable gas) | |||||||||
| HazardClass | 2.1 | |||||||||
| HS Code | 2901230000 | |||||||||
| NFPA 704 |
|
2-BUTENE Chemical Properties,Uses,Production
Chemical Properties
2-Butene, C4H8, can occur in trans or cis conformation; the former is the more stable form. It is a colorless, extremely flammable gas. 2-Butene occurs in coal gas and has been detected in diesel exhaust. The more highly reactive trans-2-butene occurs at much lower concentrations in the atmosphere than other comparable hydrocarbons.
Uses
trans-2-Butene can be used as a monomer unit to produce high molecular weight polyolefins with well-defined microstructures by nickle-catalyzed polymerization reaction. It is also used as a reactant in the isomerization reaction to produce the corresponding isomer using acid-activated catalysts.
Production Methods
2-Butene has been recovered from refining gases or produced by petroleum cracking. It is a component in the production of gasolines, butadiene, and a variety of other chemicals.
General Description
A colorless liquefied petroleum gas. An asphyxiant. Flammability limits of 1.8-9% by volume.
Air & Water Reactions
Highly flammable. Insoluble in water.
Reactivity Profile
The unsaturated aliphatic hydrocarbons, such as 2-BUTENE, are generally much more reactive than the alkanes. Strong oxidizers may react vigorously with them. Reducing agents can react exothermically to release gaseous hydrogen. In the presence of various catalysts (such as acids) or initiators, compounds in this class can undergo very exothermic addition polymerization reactions. Aluminum borohydride reacts with alkenes and in the presence of oxygen, combustion is initiated even in the absence of moisture.
Purification Methods
The gas is dried with CaH2 and purified by gas chromatography. [Beilstein 1 H 205, 1 II 176, 1 III 730, 1 IV 781.] HIGHLY FLAMMABLE.
2-BUTENE Preparation Products And Raw materials
Raw materials
Preparation Products
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| Vadilal Chemicals Limited | +91-7948936937 +91-7203030735 | Gujarat, India | 39 | 58 | Inquiry |
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| ABCR GmbH & CO. KG | 49 721 95061 0 | Germany | 6846 | 75 | Inquiry |
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