Registration Dossier

Diss Factsheets

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 for cross-reference:
data waiving: supporting information
Reference
Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
24 Dec 2018 - 15 Feb 2019
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Version / remarks:
2016
Deviations:
no
Qualifier:
according to guideline
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Version / remarks:
1995
Deviations:
no
Qualifier:
according to guideline
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.:
>= 77.2 - <= 81.9 °C

TGA EXPERIMENT (PRELIMINARY TEST)

Decrease of weight from 275°C upwards: 25% at 321°C.

After the experiment, a dark yellow/orange molten residue remained in the sample container.

The change of the colour indicated reaction and/or decomposition of the test item.

 

DSC EXPERIMENT 1

Two endothermic effects were observed between 50°C and 100°C followed by an endothermic effect starting at ca. 250°C.

The temperature at maximum of the first effect was 77.207°C and the temperature at maximum of the second effect was 79.235°C.

The endothermic effects were most likely caused by melting of the test item.

The third endothermic effect was probably caused by early stages of decomposition reactions of the test item.

After the experiment, a molten residue that lost its colour remained in the sample container.

DSC EXPERIMENT 2

In order to investigate the endothermic effects, in Experiment 2 heating was stopped directly after the melting effects.

The peak max temperature at maximum of the first effect was 79.665°C and the temperature at maximum of the second effect was 81.940°C.

After the experiment, a white molten residue remained in the sample container (original colour: off-white).

It demonstrated that melting was the reason for the endothermic effects.

DATA HANDLING

As the melting temperature of the test item could not be determined accurately due to the two effects observed,

the melting temperature is reported as a melting range from 77.2°C to 81.9°C.

 

Conclusions:
The melting range of the substance was determined to be 77.2 - 81.9°C.
Executive summary:

Differential Scanning Calorimetry was performed to determine the melting and boiling temperature. The experiments were based on EC A.1, OECD 102 and OPPTS 830.7200 (melting temperature) and on EC A.2, OECD TG 103 and OPPTS 830.722 (boiling temperature). GLP-study.

The melting range of the substance was determined to be 77.2 - 81.9°C.

Reaction and/or decomposition of the substance occurs from 250°C upwards.

Boiling of the substance was not observed below the temperature at which reaction and/or decomposition started.

Data source

Materials and methods

Results and discussion

Applicant's summary and conclusion

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