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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:
From 2015-10-30 to 2016-01-06
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Reference:
Composition 0
Qualifier:
according to
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Version / remarks:
1995
Deviations:
no
Qualifier:
according to
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Deviations:
no
GLP compliance:
no
Remarks:
The study was conducted under supervision of a quality assurance unit which had ensured e.g instrumentation validation, reagent/materials certification, analyst certification and providing standard operating procedures.
Other quality assurance:
other: SOP-LA-011 Melting Point by DSC
Type of method:
differential scanning calorimetry
Test material information:
Composition 1
Key result
Melting / freezing pt.:
-26.55 °C
Atm. press.:
986.4 hPa
Decomposition:
no
Remarks on result:
other: Range of effect: -40 to -10 °C; 150 to 220 °C
Key result
Melting / freezing pt.:
-26.57 °C
Atm. press.:
1 013.7 hPa
Decomposition:
no
Remarks on result:
other: Range of effect: -40 to -10 °C; 120 to 220

During the cooling phase, an exothermal effect was observed at a temperature of approx. -50 °C, which can be associated with the freezing of the test item.

During the heating phase a distinct endothermic effect was observed in the temperature range of -40 to -10 °C, which can be associated with the melting of the test item. As the onset temperatures in both tests deviate by less than 0.5 K from their mean value of -26.56 °C, the test item has a melting point of -26.6 °C.

The test item showed a second endothermic signal in the temperature range of approx. 120 - 220 °C that can be associated with the boiling of the test item.

Conclusions:
The test item has a melting point of -26.6 °C at atmospheric pressure (986 hPa or 1014 hPa, respectively) as determined by differential scanning calorimetry.
Executive summary:

The test item has a melting point of -26.6 °C at atmospheric pressure (986 hPa or 1014 hPa, respectively) as determined by differential scanning calorimetry according to Regulation EC no. 440/2008 Method A.1. and OECD Test Guideline 102 (1995). In the temperature range of -40 to -10 °C, an endothermic effect (melting) was observed. Between approx. 120 - 220 °C a second endothermic effect (boiling) could be detected.

Description of key information

The test item has a melting point of -26.6 °C at atmospheric pressure (986 hPa or 1014 hPa, respectively) as determined by differential scanning calorimetry according to Regulation EC No. 440/2008 Method A.1. and OECD Test Guideline 102 (1995).

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
-26.6 °C

Additional information