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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 January 2017
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Reason / purpose:
reference to same study
Qualifier:
according to
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Qualifier:
according to
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Version / remarks:
1995
Qualifier:
according to
Guideline:
EPA OPPTS 830.7200 (Melting Point / Melting Range)
Version / remarks:
1998
Qualifier:
according to
Guideline:
other: CIPAC MT 1: Freezing Point
Version / remarks:
2009
GLP compliance:
no
Type of method:
differential scanning calorimetry
Key result
Melting / freezing pt.:
70.7 °C
Atm. press.:
1 024 hPa
Decomposition:
no

Results

In the temperature range of 70 - 90 °C an endothermic effect (melting), was observed. Between approx. 170 - 290 °C a second endothermic effect (boiling) could be detected. The results are reported in the following table. No further thermal effects were observed up to the maximum test temperature of 500 °C.

 

No.

Sample weight / mg

Onset of Effect / °C

Range of effect / °C

Weight loss / mg

Atmospheric pressure / hPa

PN12654

16.34

70.43

270.41

70 - 90 (endo)

170 - 290 (endo)

16.04

1024.0

PN12655

17.90

70.96

270.56

70 - 90 (endo)

180 - 290 (endo)

17.68

1024.0

 

During the heating phase an endothermic effect was observed in the temperature range of 70 - 90 °C, which can be assigned to 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 70.70 °C, the test item has a melting point of 70.7 °C.

 

Final Results

The test item has a melting point of 70.7 °C at atmospheric pressure (1024 hPa) as determined by differential scanning calorimetry according to Regulation EC No. 440/2008 Method A.1. and OECD Test Guideline 102 (1995).

Conclusions:
A melting point value of 70.7 °C (at 1024 hPa) was determined for the test substance according to E.U. Method A.1.

Description of key information

Melting point: 70.7 °C at 1024 hPa (EU Method A.1., differential scanning calorimetry).

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
70.7 °C

Additional information