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Diss Factsheets

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:
from 05 October 2017 to 09 November 2017
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Version / remarks:
2016
Deviations:
no
Qualifier:
according to guideline
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Version / remarks:
1995
Deviations:
no
Qualifier:
according to guideline
Guideline:
EPA OPPTS 830.7200 (Melting Point / Melting Range)
Version / remarks:
1998
Deviations:
no
Principles of method if other than guideline:
A DSC experiment was performed according to the above mentioned guidelines. No melting/freezing point could be determined by DSC. Therefore an additional experiment was performed in which the consistency of the substance was determined by visual observation after storage in freezers at ca. -20°C and at ca. -80°C. The additional experiment is not a guideline study but was described in sufficient detail.
GLP compliance:
yes
Type of method:
other: 'differential scanning calorimetry' and 'visual observation after storage in freezer'
Melting / freezing pt.:
< -90 °C
Remarks on result:
other: No thermal DSC effect between 25°C and -90°C.
Key result
Melting / freezing pt.:
< -80 °C
Remarks on result:
other: The substance was observed to be a liquid at ca. -20°C and at ca. -80°C.

DSC EXPERIMENT

No effects due to melting or crystallization of the test item were observed. After the experiment it was observed that the test item was evaporated from the sample container.

ADDITIONAL EXPERIMENT

It was observed after storage that the test item was a liquid (-20°C freezer) and a viscous liquid (-80°C freezer).

Conclusions:
The substance has no melting/freezing point at temperatures down to -80°C.

Executive summary:

A DSC experiment showed no effect due to freezing of the substance between 25°C and -90°C (GLP study according to EC A.1, OECD 102 and OPPTS 830.7200).

After storage in freezers, the substance was visually observed to be a liquid at ca. -20°C and a viscous liquid at ca. -80°C.

Based on all results, it was concluded that the substance has no melting/freezing point at temperatures down to -80°C.

Description of key information

No melting/freezing point down to -80°C (visual observation and DSC experiment, EC A.1, OECD 102, OPPTS 830.7200).

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
-80 °C

Additional information

A DSC experiment showed no effect due to freezing of the substance between 25°C and -90°C. After storage in freezers, the substance was visually observed to be a liquid at ca. -20°C and a viscous liquid at ca. -80°C.