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 20 September 2016 to 06 December 2016
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
Type of method:
differential scanning calorimetry
Key result
Decomposition:
yes
Remarks on result:
other: melting was not observed below the temperature at which reaction/decomposition and/or evaporation started.

TGA EXPERIMENT (PRELIMINARY TEST)

Starting at 200°C, the weight of the sample decreased significantly. At 388°C the sample weight had decreased by 25%. After the experiment, a dark brown residue remained in the sample container.

DSC EXPERIMENT 1

During cooling and heating no effects were observed which were due to melting and/or boiling of the test item. The residue at the end of the test was dark red.

DSC EXPERIMENTS 2 AND 3

During cooling and heating no effects were observed which were due to melting and/or boiling of the test item. The residue at the end of the test was dark red in Experiment 2 and red-brown but darker than at the start of the test in Experiment 3.

DSC curve Experiment 2 during heating: see picture below.

Remark: The observed colour change in each of the tests may be due to reaction/decomposition and/or evaporation of part of the test item. 

Conclusions:
The substance has no melting point. During DSC experiments, melting of the test item was not observed below the temperature at which reaction/decomposition and/or evaporation started.
Executive summary:

Melting of the substance was investigated in a GLP study according to EC A.1, OECD 102 and OPPTS 830.7200. TGA demonstrated that reaction/decomposition and/or evaporation starts at ca. 200°C.

During DSC experiments, melting of the test item was not observed below the temperature at which reaction/decomposition and/or evaporation started. The substance has no melting temperature.

Data source

Materials and methods

Results and discussion

Applicant's summary and conclusion