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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Melting point / freezing point

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Administrative data

Link to relevant study record(s)

Description of key information

Melting point data were not available for any of the streams within this Category. However as the category consists of mainly C4 hydrocarbons, data were read across from hydrocarbon C4 substances (CAS numbers 107-01-7: -138.9°C (cis) and -105.52°C (trans), 115-11-7: -140.7°C, 106-98-9: -185°C, 25167-67-3: -185°C to -105.5°C, 106-97-8: -138°C, 75-28-5: -159.4°C). All information came from a peer reviewed handbook (CRC, 2008). The melting point range for this Category is therefore -185 to -105.5°C.

The mean of the melting point values for the category is -144.8°C and this has been used to complete the 'key value for chemical safety assessment'.

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
-144.8 °C

Additional information