Registration Dossier

Administrative data

Endpoint:
flash point of flammable liquids
Data waiving:
study technically not feasible
Justification for data waiving:
the study does not need to be conducted because the flash point is only relevant to liquids and low melting point solids
Justification for type of information:
The melting point of the substance was determined to be 196.4°C, thus the substance is not a 'low melting point solid'.
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:
Jan - March 2019
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:
2016
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.:
196.4 °C
Decomposition:
yes
Decomp. temp.:
ca. 200 °C
Remarks on result:
other: reaction and/or decomposition of the test item during and directly after melting

Two experiments were performed to investigate the melting (and boiling) behaviour of the substance.

DSC EXPERIMENT 1

An endothermic peak was observed between 175°C and 200°C directly followed by another small endothermic and an exothermic effect (see the illustration below). The extrapolated onset temperature of the first effect was 196.567°C. The endothermic effect was most likely caused by melting of the test item. The second endothermic effect and the exothermic effect were probably caused by reaction and/or decomposition of the test item.

After the experiment, a dark brown molten residue remained in the sample container (original colour: white to off-white). The change of the colour indicated reaction and/or decomposition of the test item.

DSC EXPERIMENT 2

In order to investigate the melting peak, in Experiment 2 heating was stopped directly after the melting effect. The extrapolated onset temperature was 196.218°C. After the experiment, a yellow molten residue remained in the sample container. The change of the colour indicated reaction and/or decomposition of the test item. It was therefore concluded that melting was the reason for the endothermic effect and that the test item had reacted and/or decomposed during and directly after melting.

DATA HANDLING

The melting temperature was determined as the mean melting temperature of Experiment 1 and Experiment 2.

Conclusions:
The melting temperature of the substance was determined to be 196.4°C.

Data source

Materials and methods

Results and discussion

Applicant's summary and conclusion