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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:
22 April to 30 May 2016
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)
Qualifier:
according to
Guideline:
EPA OPPTS 830.7200 (Melting Point / Melting Range)
Qualifier:
according to
Guideline:
other: CIPAC MT 1 (2009): Freezing Point
GLP compliance:
no
Type of method:
differential scanning calorimetry
Key result
Melting / freezing pt.:
>= -23 - <= -21 °C
Atm. press.:
>= 991 - <= 1 012 hPa

Results

In the temperature range of -30 to 10 °C, an endothermic effect (melting) was observed.

 

Results of the DSC-measurements

No.

Sample weight / mg

Onset of Effect / °C

Range of effect / °C

Weight loss / mg

Atmospheric pressure / hPa

PN10937

16.22

-21.56

-30 to 10 (endo)

16.22

1012

PN11163

22.82

-22.71

-30 to 10 (endo)

22.79

990.9

 

During the cooling phase, an exothermal effect was observed in the temperature range of approx. -19 to -23 °C, which can be assigned to the freezing of the test item.

During the heating phase an endothermic effect was observed in the temperature range of -30 to 10 °C, which can be assigned to the melting of the test item. As the onset temperatures in both tests deviate more than 0.5 K from their mean value of -22.14 °C, the test item has a melting range of -21 to -23 °C.

 

Final Results

The test item has a melting range of -21 to -23 °C at atmospheric pressure (991 hPa or 1012 hPa, respectively) 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 range of -23 to -21 °C (at 1012 or 991 hPa, respectively) was determined for the test substance according to E.U. Method A.1.

Description of key information

Melting range: -23 °C at 1012 hPa to -21 °C at 991 hPa (E.U. Method A.1., differential scanning calorimetry)

Key value for chemical safety assessment

Additional information