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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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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Link to relevant study record(s)

melting point/freezing point
Data waiving:
other justification
Justification for data waiving:

Description of key information

C4 F-isonitrile does not freeze at temperatures above -20 °C.

Key value for chemical safety assessment

Additional information

We propose waiving of melting point testing on the gas C4 F-isonitrile, based on column 2 of Annex VII of REACH.  A melting point study need not be conducted below a lower limit of -20 °C.  Handling experience has shown that C4 F-isonitrile does not freeze at temperatures above -20 °C.  For example, in the vapor pressure study, boiling equilibria were measured down to -39 °C.