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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:
2011-05-09 to 2011-07-11
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
according to guideline
other: ASTM E537-02 “Standard Test Method for the Thermal Stability of Chemicals by Differential Scanning Calorimetry”
Principles of method if other than guideline:
Melting point determination using DSC measurement.
GLP compliance:
yes (incl. QA statement)
Type of method:
differential scanning calorimetry
Key result
Melting / freezing pt.:
< -40 °C
Atm. press.:
1 atm

Test item runs:

The Melting Point DSC runs were carried out, in duplicate, on approx. 4 to 5 mg portions of the test item, in 50 µL aluminium crucibles. The crucibles were sealed with crimped lids. The samples were cooled to - 50 °C and then heated to +30 °C at 10 °C per minute in a test chamber of nitrogen at a purge rate of approximately 20 mL/minutes.

The following results were obtained:

a) < - 40 °C

b) < - 40 °C

average: < - 40 °C

Neither test run showed a melting endotherm at a temperature greater than - 40 °C (i.e. under the conditions of this test, the test item does not freeze).

As a further check a portion of the test item, in a small vial, was placed in a freezer at a temperature of - 30 °C. It was noted that the sample became viscous but did not freeze at this temperature.

The test item has a melting point below -40 °C.
Executive summary:

The melting point of the test item was investigated by DSC measurements. The test item has a melting point below -40 °C.

Description of key information

The test item has a melting point below -40 °C.

Key value for chemical safety assessment

Additional information