Registration Dossier

Physical & Chemical properties

Melting point / freezing point

Currently viewing:

Administrative data

Link to relevant study record(s)

Reference
Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2008
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Reason / purpose:
reference to same study
Related information:
Composition 1
Reason / purpose:
reference to other study
Related information:
Composition 1
Reference:
Composition 0
Qualifier:
according to
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
GLP compliance:
yes (incl. certificate)
Type of method:
method to determine freezing temperature
Test material information:
Composition 1
Key result
Melting / freezing pt.:
< 253 K
Atm. press.:
ca. 1 013 hPa
Decomposition:
no
Sublimation:
no
Remarks on result:
other: no freezing point detectable

An aliquot of test material was placed into a test tube containing a thermometer. A wire loop with which the sample could be agitated was placed inside the tube to ensure sample homogeneity during cooling. The test tube was surrounded by a glass jacket and then placed into a large beaker containing a dry ice/acetone mixture. The temperature and observation of the test material were recorded approximately every 30 seconds.

 

The dry/ice acetone bath was maintained until the temperature had reached approximately -20°C. The determination was carried out in duplicate. Graphs of temperature versus time (seconds) were constructed to obtain the freezing temperature.

Conclusions:
No freezing temperature could be detected in the range down to -20°C (253 K)

Description of key information

No freezing point could be detected down to -20°C (253 K).

Key value for chemical safety assessment

Additional information

Three measurements with the test tube method down to -20°C showed no freezing point.