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Physical & Chemical properties

Melting point / freezing point

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melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
Experimental dates: September 19, 2017 to September 21, 2017
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
The study was conducted according to an internationally recognized method, and under GLP. No deviation was reported. The test substance is adequately characterised. Therefore full validation applies.
according to guideline
OECD Guideline 102 (Melting point / Melting Range)
Version / remarks:
according to guideline
EU Method A.1 (Melting / Freezing Temperature)
Version / remarks:
Regulation (EC) No. 440/2008
GLP compliance:
yes (incl. QA statement)
inspected on 20 & 21 June 2017 / signed on 04 September 2017
Type of method:
differential scanning calorimetry
Specific details on test material used for the study:
The sample was tested as received. No further preliminary treatment such as drying or milling was performed.
Key result
Melting / freezing pt.:
23.9 °C

No effect was observed during the cooling phase.

The measurements showed an exothermal effect (freezing) during heating up in the temperature range of (-45) to 0°C and an endothermal effect was observed in the temperature range of 20 to 40°C. The onset temperature was derived from the intersection of the tangent line with the highest slope of the endothermal peak with the baseline.


 Test item (mg)

 Onset (°C)







Duplicate measurements arewithin accuracy (+/- 0.5 °C), therefore the mean value was retained: The test item has a mean melting point of 23.9 °C.

As the test item showed the behaviour of a subcooled melt, the evaluation of the freezing point was not possible.

Executive summary:

The melting point of the test substance was determined under GLP according to OECD 102 / EU A1 guidelines, using Differential Scanning Calorimetry method.

The determination was carried out in duplicate.

Freezing point could not be determined, due to subcooled state.

The mean melting point was measured at 23.9°C.

Description of key information

The melting point (transition from solid to liquid) was measured at 23.9°C.

Freezing point (transition from liquid to solid) could not be determined, due to subcooled state.

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
23.9 °C

Additional information

A fully reliable experimental study, conducted according to a recognized OECD/EC method and under GLP, is available. It is considered as a key study, and the result is retained as key data.