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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:
04-Sep-2014
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Reason / purpose:
reference to same study
Related information:
Composition 1
Reference:
Composition 0
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:
differential scanning calorimetry
Test material information:
Composition 1
Key result
Melting / freezing pt.:
51.6 °C
Atm. press.:
1 013 hPa

Results

In the thermograms of the two DSC runs (nos. PN7418 and PN7421) an endothermic (melting) effect was observed in the temperature range of 45 °C to 65 °C. Between 130 to 250 °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)

PN7418

11.72

51.59

210.73

45 to 65 (endo)

140 to 250 (endo)

11.57

1006.7

PN7421

14.37

52.01

210.94

45 to 65 (endo)

130 to 225 (endo)

14.37

1006.7

The distinct endothermic effect observed in the temperature range of 45 to 65 °C 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 51.55 °C, this temperature can be used as the melting point. The test item has a melting point of 51.6 °C.

Final Results

The test item has a melting point of 51.6 °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 51.6 °C (at 1013 hPa) was determined for the test according to E.U. Method A.1.

Description of key information

Melting point: 51.6 °C at 1013 hPa (EU Method A.1, differential scanning calorimetry)

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
51.6 °C

Additional information