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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:
21-Aug-2014 to 25-Aug-2014
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Qualifier:
according to
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Qualifier:
according to
Guideline:
EPA OPPTS 830.7200 (Melting Point / Melting Range)
Qualifier:
according to
Guideline:
other: CIPAC MT 1 (2009)
GLP compliance:
no
Type of method:
thermal analysis
Remarks:
Differential Scanning Calorimetry (DSC)
Key result
Melting / freezing pt.:
-40.5 °C
Atm. press.:
1 013 hPa
Decomposition:
no

Results

In the thermograms of the two DSC runs (nos. PN7337 and PN7338) an endothermic (melting) effect was observed in the temperature range of -50 °C to - 30 °C. Between 150 to 310 °C a second endothermic effect (boiling) could be detected.

Results of the DSC measurements

No.

Sample weight (mg)

Onset of effect (°C)

Range of effect (°C)

Weight loss (mg)

Atmospheric pressure (hPa)

PN7337

11.62

-40.52

266.44

-50 to -35 (endo)

150 to 310 (endo)

11.61

1004.9

PN7338

9.65

-40.55

248.54

-50 to -30 (endo)

180 to 290 (endo)

9.65

1004.9

 

The first endothermic effect was observed in the temperature range of -50 to -30 °C, which can be associated with the melting (softening) of the test item. As the onset temperatures in both tests do not deviate by more than 0.5K from their mean value of -40.54 °C, this temperature can be used as the melting point. The test item has a melting point of -40.5 °C.

Final Results

The test item has a melting point of -40.5 °C at atmospheric pressure (1013 hPa) as determined by differential scanning calorimetry according to Directive EC440/2008 Method A.1., OECD Test Guideline 102 (1995), EPA OCSPP 830.7200 (1998) and CIPAC MT 1 (2009).

 

Conclusions:
A melting point value of -40.5 °C (at 1013 hPa) was determined for the test substance according to E.U. Method A.1.

Description of key information

Melting point: -40.5 °C at 1013 hPa (EU Method A.1, differential scanning calorimetry)

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
-40.5 °C

Additional information

A melting point value of -40.5 °C (at 1013 hPa) was determined for the test substance according to E.U. Method A.1.