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:
03 Jul 2017 - 12 Jul 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
Type of method:
differential scanning calorimetry
Key result
Melting / freezing pt.:
66.9 °C
Decomposition:
yes
Decomp. temp.:
> 225 °C

TGA EXPERIMENT (PRELIMINARY TEST)

Significant decrease of weight from 250°C; 25% weight loss at 306°C and 70% weight loss at 356°C.

After the experiment, an orange/brown molten residue remained in the sample container (original colour: colourless). The change of the colour indicated reaction and/or decomposition of the test item.

 

DSC EXPERIMENT 1

An endothermic peak was observed between 50°C and 100°C. The extrapolated onset temperature of the peak could not be determined since it was too close to the start of the experiment. The endothermic effect was most likely obtained due to melting of the test item. An endothermic peak was observed starting at 225°C. The endothermic effect was due to reaction and/or decomposition of the test item.  After the experiment, a yellowish molten residue remained in the sample container.

DSC EXPERIMENT 2

In order to investigate the melting peak, Experiment 2 was stopped directly after the melting peak. A lower start temperature was applied to determine the extrapolated onset temperature of the peak.  The extrapolated onset temperature was 66.627°C. After the experiment, a colourless molten residue remained in the sample container (original colour: colourless). It demonstrated that melting was the reason for the endothermic effect.

DSC EXPERIMENT 3

Experiment 3 was performed as a duplicate of Experiment 2. Similar results as in Experiment 2 were obtained. 

The extrapolated onset of the melting peak was 67.249°C.

DATA HANDLING

The melting temperature was determined as the mean extrapolated onset temperature of Experiment 2 and Experiment 3.

GRAPHS

See Attached background material.

 

Conclusions:
The melting temperature of the substance was determined to be 66.9°C.

Executive summary:

Differential Scanning Calorimetry (DSC) experiments were performed in a GLP study according to EC A.1, OECD 102 and OPPTS 830.7200.

The melting temperature of the substance was determined in duplicate obtaining a mean value of 66.9°C.

During heating from 25°C to 306°C reaction and/or decomposition of the substance started at 225°C.

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2017
Report Date:
2017

Materials and methods

Results and discussion

Applicant's summary and conclusion