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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Physical & Chemical properties

Boiling point

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Administrative data

Link to relevant study record(s)

Description of key information

The boiling point data were not available for any of the streams within this Category. However, data were read across from the main hydrocarbon C4 constituents in this Category. The representative constituents of the category studied and used as supporting read-across are But-1-en-3-yne (CAS 689-97-4), But-1-ene (CAS 106-98-9), But-2-ene, cis- (CAS 590-18-1), But-2-ene, trans- (CAS 624-64-6), Buta-1,2-diene (CAS 590-19-2), Buta-1,3-diene (CAS 106-99-0), Butane (CAS 106-97-8), Prop-1-ene, 2-methyl- (CAS 115-11-7), and Propane, 2-methyl- (CAS 75-28-5).


The boiling points presented in the dossier are compilation of QSAR data and data from peer review handbooks. MPBPWIN v1.43 model of Epi Suite has been used as key QSAR. No information on the test methods used is available in the handbooks; however, as the information is taken from peer reviewed handbooks and it can be considered reliable and suitable for use as the key study for this endpoint.


The boiling points of the representative constituents of this Category range from -11.73 to 10.9 °C.

Key value for chemical safety assessment

Additional information