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Melting point / freezing point

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melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
guideline study with acceptable restrictions
according to guideline
other: - EC L 251/A1 and DIN 51421
Principles of method if other than guideline:
Visual observation
GLP compliance:
Type of method:
method to determine freezing temperature
Key result
Melting / freezing pt.:
< -60 °C
Remarks on result:
other: crystallizes

The test substance crystallizes below 213 K

The test substance crystallizes below -60°C

Description of key information

Crystallizes below -60°C

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
-60 °C

Additional information

The determination was done according to EC Guideline L 251/Al (melting-point / melting-range) with the aid of DIN 51421.

It was impossible to follow exactly the proposed procedures, because of the solidification of the test substance during the cool down period, which prevented the necessary stirring. The observation of the freezing process had to be done visually, because no temperature increase or temperature plateau could be measured.