0102030405
0102030405
High Purity Trans-2-butene Gas (C4H8) Fluorocarbon Gases
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Contact usSpecifications
| Purity(GC Area %) | 99.81% | >99% |
| 1-Butene | <0.01% | report |
| cis-2-Butene | 0.10% | report |
| trans-2-Butene | 99.81% | >99% |
| 1,2-Butadiene | <0.01% | report |
| 1-Butyne | <0.01% | report |
| Butane | 0.07% | report |
| Other | <0.01% | report |
Technical Information
| Chemical formula | C4H8 |
| Molar mass | 56.106 g/mol |
| Density | 0.626 g/ml (trans, 0.9 °C) |
| Melting point | -105.5 °C (trans) |
product description
But-2-ene is an acyclic alkene with four carbon atoms. It is the simplest alkene exhibiting cis/trans-isomerism (also known as (E/Z)-isomerism); that is, it exists as two geometric isomers cis-but-2-ene ((Z)-but-2-ene) and trans-but-2-ene ((E)-but-2-ene).
The two isomers are extremely difficult to separate by distillation because of the proximity of their boiling points (~4 °C for cis and ~1 °C for trans[5]). However, separation is unnecessary in most industrial settings, as both isomers behave similarly in most of the desired reactions. A typical industrial but-2-ene mixture is 70% (Z)-but-2-ene (cis-isomer) and 30% (E)-but-2-ene (trans-isomer). Butane and but-1-ene are common impurities, present at 1% or more in industrial mixtures, which also contain smaller amounts of isobutene, butadiene and butyne.
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