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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

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melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
comparable to guideline study with acceptable restrictions
The study was conducted using a relevant test method but not in compliance with any known quality system.
equivalent or similar to guideline
EU Method A.1 (Melting / Freezing Temperature)
not specified
GLP compliance:
not specified
Type of method:
thermal analysis
Differential thermal analysis
Melting / freezing pt.:
-99.1 °C
Atm. press.:
1 013 hPa
Melting / freezing pt.:
174 K
Atm. press.:
1 013 hPa
A melting point value of -99.1°C (174 K) at 1013 hPa was determined for the substance using differential thermal analysis. The result is considered reliable.

Description of key information

Freezing point: -99.1°C at 1013 hPa

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
-99.1 °C

Additional information

A freezing point value of -99.1°C (174 K) was determined for the substance using a differential thermal analysis method. The result is considered to be reliable and is selected as key study.

In available secondary sources to which reliability could not be assigned, freezing point values of -99°C, -102.2°C and -100.2°C at 1013 hPa were reported for the substance. The available values are consistent that the freezing point of the substance is <-20°C.