Registration Dossier

Administrative data

Endpoint:
boiling point
Data waiving:
study scientifically not necessary / other information available
Justification for data waiving:
the study does not need to be conducted because the substance is a solid which melts above 300°C
Justification for type of information:
JUSTIFICATION FOR DATA WAIVING
The melting point of the substance was found to be above 600 °C in a DSC analysis and above 1000 °C in a DTA in nitrogen atmosphere. The substance undergoes oxidative decomposition in an air atmosphere at 840 °C. Therefore, measurement of a boiling point under reduced pressure is not necessary.
Cross-reference
Reason / purpose:
data waiving: supporting information
Reference
Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
12 Jun 2018
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Deviations:
no
Qualifier:
according to
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Deviations:
no
GLP compliance:
no
Type of method:
differential scanning calorimetry
Remarks:
and Differential Thermo-Analysis (DTA)
Melting / freezing pt.:
> 600 °C
Decomposition:
yes
Decomp. temp.:
840 °C
Remarks on result:
other: No melting point in the temperature range 22 - 600 °C; Oxidative decomposition in an air atmosphere at 840 °C.

Results

DSC: Neither Tg (glass transition temperature) nor melting point was observed between 22 to 600 °C.

 

DTA: Neither endothermic nor exothermic peak was observed between 20 to 1000 °C in a nitrogen atmosphere. The peak due to oxidative decomposition was observed at 840 °C in an air atmosphere.

 

Conclusion

The test item has no melting point in the temperature range of 22 - 600 °C. Oxidative decomposition of the test item was occurred at 840 °C.

Conclusions:
No melting point observed in the temperature range 22-600 °C. The substance undergoes oxidative decomposition in an air atmosphere at 840 °C.

Data source

Materials and methods

Results and discussion

Applicant's summary and conclusion