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:
2011-06-10 to 2011-06-16
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Remarks:
Study conducted in accordance with relevant test method and in compliance with ISO 17025
Qualifier:
according to
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Version / remarks:
27 July 1995
Deviations:
no
Qualifier:
according to
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Version / remarks:
30 May 2008
Deviations:
no
GLP compliance:
no
Other quality assurance:
ISO/IEC 17025 (General requirements for the competence of testing and calibration laboratories)
Type of method:
differential scanning calorimetry
Key result
Atm. press.:
1 013 hPa
Remarks on result:
other: No melting was observed between -150°C and +35°C under the condition of the test, but glass transition was observed at -122°C.

The DSC measurements were performed twice. After cooling to -150°C at a rate of 2 K/min the sample was heated to 35°C at a rate of 10 K/min. The cooling as well as the heating curve show only a glass transition, indicating that the test item had solidified amorphously. No other thermal effect from crystallisation or melting was registered upon further heating, see attached DSC thermograms.

Melting temperature: No melting point was found between -150 and +35°C under these conditions. A glass transition was observed at -122°C / -122°C.

Conclusions:
No melting was observed for the test substance under the condition of the test between -150°C to +35°C at 1013 hPa, but a glass transition was observed at -122°C. The result is considered to be reliable.

Description of key information

Melting point: no melting observed between -150 and +35°C at 1013 hPa (OECD 102)

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
-20 °C

Additional information

In a DSC study conducted in accordance with OECD Test Guideline 102 and in compliance with ISO 17025, no melting was observed for the test substance under the conditions of the test between -150 and +35°C at 1013 hPa, but a glass transition was observed at -122°C. The result is considered to be reliable and is selected as key study.

In a secondary source to which no reliability could be assigned, a limit melting point of <-80°C was reported for the substance.