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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:
02-Sep-2014
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Reference:
Composition 1
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 (2009): Freezing point
GLP compliance:
no
Type of method:
thermal analysis
Remarks:
Differential scanning calorimetry (DSC)
Test material information:
Composition 1
Key result
Melting / freezing pt.:
6.8 - 7 °C
Atm. press.:
1 013 hPa

Results

In the thermograms of the two DSC runs (nos. PN7387 and PN7397) an endothermic (melting) effect was observed in the temperature range of -10 °C to 25 °C. Between 155 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)

PN7387

11.67

7.04

274.02

-5 to 20 (endo)

160 to 310 (endo)

11.55

1008.3

PN7397

10.59

6.83

272.18

-5 to 25 (endo)

160 to 320 (endo)

10.59

1008.5

 

During the heating phase a distinct endothermic effect was observed in the temperature range of -5 to 25 °C, which can be associated with the melting of the test item. As the onset temperatures in both tests do not deviate by more than 0.5K from their mean value of 6.94 °C, this temperature can be used as the melting point. The test item has a melting point of 6.8 to 7.0 °C.

Final Results

The test item [trade name] has a melting point of 6.8 to 7.0 °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 6.8 to 7 °C (at 1013 hPa) was determined for the test substance according to E.U. Method A.1.

Description of key information

Melting point: 6.8 to 7 °C at 1013 hPa (EU Method A.1, differential scanning calorimetry)

Key value for chemical safety assessment

Additional information

A melting point value of 6.8 to 7 °C (at 1013 hPa) was determined for the test substance according to E.U. Method A.1.