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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 14 June 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)
GLP compliance:
no
Type of method:
differential scanning calorimetry
Key result
Melting / freezing pt.:
>= -36 - <= -32 °C
Atm. press.:
>= 987 - <= 1 012 hPa
Decomposition:
no

Results

In the temperature range of -50 to -20 °C an endothermic effect (melting) was observed. Between approx. 120 - 260 °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]

PN10938

15.74

-35.52

235.07

-50 to -20 (endo)

150 – 260 (endo)

15.66

1012

PN11246

17.46

-32.43

233.86

-50 to -20 (endo)

120 – 260 (endo)

17.38

987.3

 

During the cooling phase, an exothermal effect was observed in the temperature range of -60 to -70 °C, which can be assigned to the freezing of the test item.

During the heating phase a distinct endothermic effect was observed in the temperature range of -50 to -20 °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 -33.98 °C, the test item has a melting range of -32 °C to -36 °C.

The test item showed a second endothermic signal in the temperature range of approx. 120 – 260 °C that can be assigned to the boiling of the test item.

No further thermal effects were observed up to the maximum test temperature of 500 °C.

 

Final Results

The test item has a melting range of -36 °C to -32 °C at atmospheric pressure (987 and 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 -36 to -32 °C (at 987 and 1012 hPa, respectively) was determined for the test substance according to E.U. Method A.1.

Description of key information

Melting range: -36 to -32 °C at 987 and 1012 hPa, respectively (EU Method A.1, differential scanning calorimetry)

Key value for chemical safety assessment

Additional information