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Physical & Chemical properties

Melting point / freezing point

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Description of key information

Under the conditions of this study, the pour point of the test material was determined to be -18 ± 3 °C (255 ± 3 K).

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
-18 °C

Additional information

The melting point of the test material was investigated using the pour point method in accordance with the standardised guidelines OECD 102 and EU Method A.1 under GLP conditions. It was assigned a reliability score of 1 in accordance with the criteria detailed by Klimisch (1997).

A sample of test material was poured into a test jar which was then enclosed in a glass jacket. The sample was heated to 46 °C in a water bath set at 48 °C before being allowed to cool in air to 35 °C. The sample was then transferred to a bath maintained at -1 to 2 °C and cooled further.

At a sample temperature of 10 °C, the sample was transferred to a bath maintained at -15 to -18 °C. Finally, at a sample temperature of -7 °C, the bath temperature was reduced into the range of -32 to -35 °C. Starting at -6 °C, and at intervals of 3 °C, the sample was tilted to a horizontal position for a period of 5 seconds, during which the sample was observed for signs of flow.

The temperature at which no flow/movement was first observed was noted as the stationary point and the determination terminated.

Under the conditions of this study, the pour point of the test material was determined to be -18 ± 3 °C (255 ± 3 K).