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Physical & Chemical properties

Melting point / freezing point

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Reference
Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
From 12 October 2017 to 21 February 2018
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Reason / purpose:
reference to other study
Related information:
Composition 1
Reason / purpose:
reference to other study
Related information:
Composition 1
Reason / purpose:
reference to other study
Related information:
Composition 1
Reason / purpose:
reference to other study
Related information:
Composition 1
Reference:
Composition 0
Qualifier:
according to
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Version / remarks:
1995
Deviations:
no
Qualifier:
according to
Guideline:
EU Method A.1 (Melting / Freezing Temperature)
Version / remarks:
2016
Deviations:
no
Qualifier:
according to
Guideline:
EPA OPPTS 830.7200 (Melting Point / Melting Range)
Version / remarks:
1998
Deviations:
no
GLP compliance:
yes (incl. certificate)
Type of method:
differential scanning calorimetry
Test material information:
Composition 1
Key result
Melting / freezing pt.:
307.9 °C

In the preliminary test, the weight of the sample decreased significantly at 400°C. After the experiment, a brown/black molten residue remained in the sample container (original colour: off-white). The change of colour indicated reaction and/or decomposition of the test item.

In the DSC experiments, endothermic peaks have been observed between 300°C and 325°C. The extrapolated temperatures of the peaks were 307.95°C and 307.86°C (respectively in assay 1 and 2). In the second assay, the experiment was stopped directly after the melting peak. After the experiment, an off-white molten residue remained in the sample container. It demonstrated that melting was the reason for the endotermic effet.

Conclusions:
The melting point of the test item is 307.9°C
Executive summary:

The melting point of the test item was determined by the differential scanning method according to recognised guideline and in compliance with GLP (Brekelmans, 2018). No deviation from the guideline was observed in the study.

The melting point was determined in two assays. The test item melts at 307.9°C.

Description of key information

The melting point of the test item was detemined in a key study of Klimisch validity 1 performed according to recognised guidelines and in compliance with GLP (Brekelmans, 2018).

No deviation from the guideline was observed in the study.

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
307.9 °C

Additional information