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Physical & Chemical properties

Melting point / freezing point

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Description of key information

The  melting point of 4-Hydroxy-TEMPO is well described within a range of 70-72 °C.

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
70 °C

Additional information

Weight of evidence approach:

In eleven publications between 1964 and 1995 the melting point of 4 -Hydroxy-TEMPO was determined. There are no deviation between the different studies in the value of the melting rage. This melting range of 70 -72 degree Celcius is thus regarded as reliable.