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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Physical & Chemical properties

Melting point / freezing point

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Reference
Endpoint:
melting point/freezing point
Type of information:
read-across from supporting substance (structural analogue or surrogate)
Adequacy of study:
key study
Justification for type of information:
Read-across from alternative salt forms of this substance is justified. See the jusitifcation document in section 13 for more details.
Reason / purpose for cross-reference:
read-across source
Qualifier:
according to guideline
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
GLP compliance:
yes (incl. QA statement)
Type of method:
differential scanning calorimetry
Key result
Decomposition:
yes
Decomp. temp.:
> 200 °C
Remarks on result:
other: no melting temp. up to 200°C

No melting temperature was found between 0°C and decomposition of the test item, starting at about 200°C.

Observed thermic processes:

After Test 1 the test item was not molten up and did not show any visual change. This was a clear indication that the observed endothermic peak at 138°C peak temperature and the registered weight loss of 1.8 % showed the vaporization of volatile components of the test item. After Test 2 the test item was not molten up. It was sintered and the color changed into black. This was a clear indication that the observed exothermic area starting at about 200°C with the registered weight loss of 11.4 % showed the decomposition of the test item. The small endothermic maximum in the 2"d heating at about 120°C to 160°C might be the melting of a secondary component, but not of the test item itself, because the test item was powdery as before after Test 1. These observations are confirmed by the preliminary TG/DSC-Test (non-GLP).

Conclusions:
The study with the read-across substance showed no melting temperature between 0 °C and decomposition of the test item, starting at about 200 °C.

Description of key information

Melting point is not determined for the substance as decomposition was observed at temperatures >200 °C in the study with the read-across substance. This is expected also for the registered substance.

Key value for chemical safety assessment

Additional information