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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

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:
05 Dec 2017 - 14 Dec 2017
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.:
>= 262.6 - <= 265.3 °C
Decomposition:
yes
Remarks on result:
other: Decomposition started during melting.

TGA EXPERIMENT (PRELIMINARY TEST)

Starting at 275°C, the weight of the sample decreased slightly, yet up to 550°C a significant decrease in sample weight was not observed.

After the experiment, a black molten residue remained in the sample container. The change of the colour indicated reaction and/or decomposition of the test item. 

DSC EXPERIMENT 1

An endothermic peak was observed between 250°C and 275°C directly followed by exothermic effects starting at 275°C. The extrapolated onset temperature of the endothermic peak was 265.268°C. The endothermic effect was most likely caused by melting of the test item. The exothermic effects were ascribed to reaction and/or decomposition of the test item. After the experiment, a black molten residue remained in the sample container. The change of the colour indicated reaction and/or decomposition of the test item. Based on this visual observation, it was concluded that the test item had molten and that the change of the colour demonstrated 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 peak. The extrapolated onset temperature was 262.559°C. After the experiment, an off-white/yellowish molten residue remained in the sample container. The change of the colour indicated reaction and/or decomposition of the test item. It also demonstrated that melting was the reason for the endothermic effect.

DSC EXPERIMENT 3

Since the difference in extrapolated onsets between the first two experiments was > 1°C, Experiment 3 was performed using the same conditions as in Experiment 2. The extrapolated onset of the melting peak was 263.042°C. After the experiment, an off-white/yellowish molten residue remained in the sample container.

DATA HANDLING

Since reaction and/or decomposition was observed during melting of the test item, a relatively high difference between the extrapolated onsets was observed. Therefore a melting range was given instead of a melting temperature. The melting range was determined between the lowest and highest melting temperature of Experiment 1 (265.268°C), Experiment 2 (262.559°C) and Experiment 3 (263.042°C).

Conclusions:
The melting range of the substance was determined to be 262.6-265.3°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.

A melting range instead of a well defined melting temperature was determined. The melting range of the substance was determined to be 262.6-265.3°C.

Reaction and/or decomposition of the substance started during melting.

Data source

Materials and methods

Results and discussion

Applicant's summary and conclusion