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Physical & Chemical properties

Melting point / freezing point

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Description of key information

The mean melting temperature of maleic acid is 132.5 °C

Handbook data: 130–131 °C and 138–139 °C.

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
132.5 °C

Additional information

The determination of the melting temperature of the test substance was performed by the capillary method with hot block heating.

The results of the 3 repeat determinations of the melting temperature for the test substance were: 132.7, 132.4 and 132.4 °C. The mean melting temperature of maleic acid is 132.5 °C, with a standard deviation of 0.14.

Supporting Handbook data: 130–131 °C and 138–139 °C.