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Melting point / freezing point

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melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
20-21 October 2003
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
according to
OECD Guideline 102 (Melting point / Melting Range)
according to
EU Method A.1 (Melting / Freezing Temperature)
GLP compliance:
yes (incl. certificate)
Type of method:
thermal analysis
Specific details on test material used for the study:
- Lot/batch No.: 00410155
- Analytical purity: 96%
- Expiration date of the lot/batch: 2004-05-05
- Storage condition of test material: At room temperature at about 20°C
Key result
Melting / freezing pt.:
123.4 °C
Remarks on result:
other: The atmospheric pressure was not reported, ambient conditions were anticipated.

Preliminary test

A preliminary test was performed in the heating range from 25°C to 400°C with a heating rate of 20K/min. The first endothermic heat effect, the melting, was observed at 123.3°C.

Main test (two main test runs)

In order to determine the melting more precisely, further DSC-runs were recorded between 90°C and 170°C with a heating rate of 5 K/min. In the first main test run, the melting of T002251 was determined at 123.6°C. The melting of the test item during the second main test run was determined to be 123.5°C. During these runs, the samples lost 3% and 1.4% of their mass, respectively. After measurement both samples were melted and brownish black in color.

The mean melting point of T002251 was determined to be 123.4°C +/-0.2°C under the conditions of the test.

Description of key information

The melting point of T002251 was determined to be 123.4°C in a GLP study according to OECD guideline 102 and EU method A.1 (K1, Tognucci, 2003).

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
123.4 °C

Additional information