Registration Dossier

Physical & Chemical properties

Melting point / freezing point

Currently viewing:

Administrative data

Link to relevant study record(s)

Reference
Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
November 18th, 2015
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
test procedure in accordance with generally accepted scientific standards and described in sufficient detail
Qualifier:
according to
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Version / remarks:
adopted July 27, 1995
Qualifier:
according to
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
GLP compliance:
no
Type of method:
differential scanning calorimetry
Decomposition:
yes
Decomp. temp.:
340 - 380 °C

First experiment: the first endothermic peak was observed between start temperature and 230 °C, probably caused by the water evaporation. The second endothermic peak very low intensity was observed between 340 and 380 °C, caused by the thermal decomposition of the test substance. After the experiment the sample had lost 0.61 mg (32.97 %) of its mass and the residue had a black colour.

 

Second experiment: the endothermic peak was observed between start temperature and 225 °C, caused by the water evaporation. The second endothermic peak very low intensity was observed between 340 and 380 °C, caused by the thermal decomposition of the test substance. After the experiment the sample had lost 0.48 mg (21.92 %) of its mass and the residue had a black colour.

Third experiment: the endothermic peak was observed between start temperature and 225 °C, caused by the water evaporation. After the experiment the sample had lost 0.19 mg (8.88 %) of its mass and the aspect was not change.

Conclusions:
Melting temperature of the test substance could not be determined because of thermal degradation (at 340 - 380 °C) of the test substance.
Executive summary:

The melting temperature of the test substance was investigated. The Differential Scanning Calorimetry method was used. The procedures used in the study were in accordance with OECD Test Guideline No.102. 

At the temperature of 230 °C an endothermic reaction was recorded, which was probably caused by the water evaporation. A second endothermic peak very low intensity was observed between 340 and 380 °C, caused by the thermal decomposition of the test substance. After the experiment the sample had lost of its mass and the residue had a black colour.

 

Conclusion

Melting temperature of the test substance could not be determined because of thermal degradation of the test substance.

Description of key information

Decomposition before melting (340-380 °C)

Key value for chemical safety assessment

Additional information

Differential Scanning Calorimetry - OECD 102