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Physical & Chemical properties

Boiling point

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Description of key information

The boiling point of 2-methybut-1-ene is 31.2°C at 101.325 kPa and for 2-methylbut-2-ene the boiling point is 38.56°C at 101.325 kPa. These values can be used as read-across for isoamylene (2-methylbutene, CAS 26760-64-5).

Key value for chemical safety assessment

Additional information

No information on the primary source of this data or the methods used is available. However, this information is taken from a reliable peer reviewed handbook, Lide (2008) and so can be considered reliable and suitable for use as the key study for this endpoint. Most up to date source at the time. The boiling point of 2-methylbut-1-ene is 31.2 °C at 101.325 kPa and for 2-methylbut-2-ene the boiling point is 38.56°C at 101.325 kPa. Since isoamylene (2-methylbutene, CAS 26760-64-5) is a mixture of the two isomers, 2-methylbut-2-ene (CAS 513-35-9) and 2-methylbut-1-ene (CAS 563-46-2) and in the absence of any reliable data for isoamylene then this data is considered suitable for read-across.