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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Physical & Chemical properties

Boiling point

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Administrative data

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Description of key information

The mean boiling temperature of is 157.8 °C.

Handbook data: ~138 °C.

Key value for chemical safety assessment

Boiling point at 101 325 Pa:
157.8 °C

Additional information

The method of Siwoloboff was used.

The atmospheric pressure during the test was 99.7 kPa (calibrated barometer GPB 230, Petrotest, Germany).

The results of the 2 repeat determinations of the boiling temperature for the test substance were: 158.1 and 157.5 °C.

The mean boiling temperature of maleic acid is 157.8 °C.

Supporting Handbook data: ~138 °C.