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Physical & Chemical properties

Melting point / freezing point

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melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2016-09-14 to 2016-12-08
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
according to guideline
OECD Guideline 102 (Melting point / Melting Range)
Version / remarks:
according to guideline
EU Method A.1 (Melting / Freezing Temperature)
Version / remarks:
May 2008
GLP compliance:
Type of method:
method to determine freezing temperature
Key result
Melting / freezing pt.:
< -35 °C
Atm. press.:
>= 985.8 - <= 989.4 mBar
Remarks on result:
other: No phase transition observed

The temperature in the crystallisation tube with the test item steadily followed the temperature of the bath in the main test.

No typical effect indicating a phase transition was observed. At the end of the measurement, the test item was liquid and only several small crystals in the liquid were observed.

The freezing point of the test item is < -35°C at 989 to 986 mBar.
Executive summary:

The freezing temperature was assessed according to OECD 102, using a crystallization tube. The test item was cooled from 20°C to -40°C with a rate of 1°C/min. No phase transition was observed, the test item remained liquid and only several small crystals in the liquid were observed. It is hence concluded that the freezing temperature is < -35°C at 989 to 986 mBar.

Description of key information

For this endpoint two studies are available. A recent experimental study (2016) was performed according to OECD 102. The study showed that the freezing temperature of the test item is < -35°C at 986 to 989 mbar. According to the CRC Handbook (1993) the freezing temperature is -91°C. This result is used as supporting information.

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
-35 °C

Additional information