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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:
08 Sep - 09 Oct 2017
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Reason / purpose:
reference to other study
Qualifier:
according to
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Qualifier:
according to
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Type of method:
differential scanning calorimetry
Specific details on test material used for the study:
Storage conditions: dry at ambient temperature (10 - 30 °C)
Atm. press.:
>= 999 - <= 1 008 hPa
Remarks on result:
not determinable
Remarks:
No melting point detected up to 500 °C at atmospheric pressure.

Results
In the temperature range of 230 – 350 °C, a broad endothermic effect was seen.

Table 1 – Results of the DSC measurements

Sample weight [mg]

Onset of effect [°C]

Range of effect [°C]

Weight loss [mg]

11.90

242.16

230 – 350 (endo)

1.97

11.28

238.10

230 – 350 (endo)

1.99

 

The broad endothermic effect seen in the temperature range of 230 – 350 °C cannot be clearly assigned to the melting of the test item. Furthermore, the test using the melting point apparatus showed no melting of the test item in the temperature range from ambient temperature to 434 °C, and no change of appearance of the test item was seen. Therefore, the test item has no melting point in the temperature range of 25 – 500 °C.

Conclusion
The test item has no melting point up to a temperature of 500 °C at atmospheric pressure (999 – 1008 hPa) as determined by DSC.

Description of key information

The test item has no melting point up to a temperature of 500 °C at atmospheric pressure (OECD 102, DSC).

Key value for chemical safety assessment

Additional information