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Melting point / freezing point

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Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
09/04/2015 - 14/04/2015
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Deviations:
no
GLP compliance:
yes
Type of method:
differential scanning calorimetry
Specific details on test material used for the study:
SOURCE OF TEST MATERIAL
- Source and lot/batch No.of test material:040802#
Key result
Decomposition:
yes
Decomp. temp.:
392.8 °C
Remarks on result:
not determinable
Remarks:
The material decomposes before melting and boiling

The test item was observed to undergo an endothermic event from 362 °C which based on observations during the test using the photocell detection test, was not an indication of melting.This was followed by a small exothermic reaction at 392.8°C. On completion of testing the sample had decomposed during the test.

Conclusions:
The substance decomposes before the melting temperature.
Executive summary:

The melting point assessment was evaluated using the DSC method, according to the EU A.1 test guideline. An exothermic reaction was significant of a decomposition of the test item before melting.

Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
supporting study
Study period:
31/03/2015
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Deviations:
no
GLP compliance:
yes
Type of method:
capillary method
Remarks:
Photocell detection
Specific details on test material used for the study:
SOURCE OF TEST MATERIAL
- Source and lot/batch No.of test material:040802#
Key result
Melting / freezing pt.:
> 300 °C

 Run Number  2
 Mass of sample used (g) 0.007   0.007
 Initial melting point (°C)  N/A  N/A
 Final Melting point (°C)  N/A  N/A

No melting up to 300°C. Heating was continued up to 350°C, expansion of sample and slight discoloration was observed from 310°C.

Conclusions:
The melting temperature of the substance was considered > 300°C.
Executive summary:

The melting point assessment was evaluated using the capillary method and photocell detection, according to the EU A.1 test guideline. No melting is observed up to 300°C, end of the temperature range of this method.

Description of key information

The substance decomposes before the melting temperature (EU Guideline A.1: Thermal analyses (Differential Scanning Calorimetry (DSC))).

Key value for chemical safety assessment

Additional information

No melting point (substance decomposes before).