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 decomposes before boiling
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:
from 12 April 2016 to 13 April 2017
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Version / remarks:
2008
Deviations:
no
Qualifier:
according to
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Version / remarks:
1995
Deviations:
no
Qualifier:
according to
Guideline:
EPA OPPTS 830.7200 (Melting Point / Melting Range)
Version / remarks:
1998
Deviations:
no
GLP compliance:
yes (incl. certificate)
Type of method:
differential scanning calorimetry
Key result
Decomposition:
yes
Decomp. temp.:
> 225 °C
Remarks on result:
other: no melting point

TGA EXPERIMENT (PRELIMINARY TEST)

From 50°C upwards the weight of the sample decreased significantly. 25% weight loss at 346°C. 56% weight loss at 550°C. After the experiment, a black residue remained in the sample container (original colour: yellow/brown). The change of the colour indicated reaction and/or decomposition of the test item.

 

DSC EXPERIMENT

DSC curve: see illustration below. A broad endothermic peak between 25°C and 225°C was observed. The effect was most likely obtained due to evaporation of impurities in the test item. The endothermic peak between 225°C and 346°C was due to reaction and/or decomposition of the test item. After the experiment, a brown residue remained in the sample container.

 

Conclusions:
The substance has no melting temperature. Decomposition starts at > 225°C.

Executive summary:

In a GLP study according to EC A.1, OECD 102 and OPPTS 830.7200 it was concluded from a DSC experiment that reaction and/or decomposition of the test item started at temperatures above 225°C. Melting of the test item was not observed below the temperature at which reaction and/or decomposition started. The substance has no melting temperature.

Data source

Materials and methods

Results and discussion

Applicant's summary and conclusion