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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:
19.01.2012
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Deviations:
no
Qualifier:
according to
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Deviations:
no
GLP compliance:
no
Type of method:
differential scanning calorimetry
Key result
Melting / freezing pt.:
74.6 °C
Atm. press.:
1 013 hPa
Decomposition:
no
Sublimation:
no

Two DSC-measurements in aluminium crucibles with a hole showed an endothermic effect in the temperature range of 65 - 90 °C with an onset temperature of 74.4 °C to 74.7 °C. The onset temperatures are derived from the intersection of the tangent line with the highest slope of the endothermic peak with the baseline.

Conclusions:
The melting point of the substance was determined to be 74.6 °C at 1013.25 hPa.
Executive summary:

A study was conducted according to OECD test guideline 102, Regulation (EC) No 440/2008 method A.1 to determine the melting point of the test item using differential scanning calorimetry. The test item was weighed out into an aluminium crucible under an inert atmosphere (nitrogen). Two tests with about 19 to 20 mg of the test item were performed. As reference crucible, an empty aluminium crucible was used. The substance is a solid at ambient conditions. The test item was heated up from ambient to the final temperature (150 °C) at a constant heating rate (10 K/min) in a defined atmosphere (nitrogen). Two DSC-measurements in aluminium crucibles with a hole showed an endothermic effect in the temperature range of 65 - 90 °C with an onset temperature of 74.4 °C to 74.7 °C. The onset temperatures are derived from the intersection of the tangent line with the highest slope of the endothermic peak with the baseline.

Description of key information

The melting point of the substance was determined to be 74.6°C at 1013.25 hPa.

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
74.6 °C

Additional information

A study was conducted according to OECD test guideline 102, Regulation (EC) No 440/2008 method A.1 to determine the melting point of the test item using differential scanning calorimetry. The test item was weighed out into an aluminium crucible under an inert atmosphere (nitrogen). Two tests with about 19 to 20 mg of the test item were performed. As reference crucible, an empty aluminium crucible was used. The substance is a solid at ambient conditions. The test item was heated up from ambient to the final temperature (150 °C) at a constant heating rate (10 K/min) in a defined atmosphere (nitrogen). Two DSC-measurements in aluminium crucibles with a hole showed an endothermic effect in the temperature range of 65 - 90 °C with an onset temperature of 74.4 °C to 74.7 °C. The onset temperatures are derived from the intersection of the tangent line with the highest slope of the endothermic peak with the baseline.