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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:
2002
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Version / remarks:
- EEC Directive 92/69, A.1
Deviations:
not specified
GLP compliance:
yes
Type of method:
differential scanning calorimetry
Key result
Melting / freezing pt.:
68 °C
Decomposition:
yes
Decomp. temp.:
> 270 °C
Sublimation:
no
Remarks on result:
other: ±0.4 °C

The results of the individual measurements are summarized in the attached table. The test item handling (e.g. weighing) was performed under red light.

The first endothermic heat effect, the melting, was observed at 72.8 °C. After the experiment, the sample had lost about 61 % of its mass and the color of the sample was black, carbonized and melted.

In order to determine the melting more precisely, further DSC-runs were recorded between 30 °C and 130 °C with a heating rate of 5 K/min. In the first main test run, the melting of test item was determined at 68.2 °C. The melting of the test item during the second

main test run was determined to be at 67.7 °C. During these runs, the samples lost 7.8 % and 1.6 % of their mass, respectively. After the measurement both samples were melted, clear and yellowish.

Conclusions:
The melting point of test substance was determined to be 68°C at 1013 hPa
Executive summary:

In this guideline (OECD 102) study conducted to GLP standards, the test material (EC 438-340-0) was determined to have a melting point of 68°C at 1013 hPa.

Description of key information

Study conducted to recognised testing guidelines with GLP.

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
68 °C

Additional information

Melting point: 68°C. The measurement was conducted by DSC