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Physical & Chemical properties

Melting point / freezing point

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Reference
Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2005-04-05 - 2006-12-15
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Remarks:
non GLP
Qualifier:
according to
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Version / remarks:
EEC Publication No. L383, December 1992
GLP compliance:
no
Type of method:
other: Differential Scanning Calorimetry
Melting / freezing pt.:
ca. -88 °C
Atm. press.:
1 000 hPa
Remarks on result:
other: Glass transition temperature

The DSC-curve shows no melting peak, but an endothermic Cp-step at - 88 °C overlapped by a relaxation peak. This thermodynamic behavior is characteristic for glass transition, that means the test item solidifies amorphously.

Conclusions:
No melting point was detected but a glass transition temperature at - 88°C at 1000 hPa.
Executive summary:

No melting point was detected but a glass transition temperature at - 88°C at 1000 hPa.

Description of key information

No melting point was detected but a glass transition temperature at ca. - 88 °C at 1000 hPa. (Evonik Röhm Services, 2007)

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
-88 °C

Additional information

EEC, No. L383 (1992), Differential Scanning Calorimetry,