Registration Dossier

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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Endpoint summary

Administrative data

Description of key information

Additional information

Remarkable physical-chemical properties of maleic acid:

- The melting temperature is 132.5 °C.

- The boiling temperature is 157.8 °C at 99.7 kPa.

- The relative density is 1.59 at 20 °C.

- The median particle size L50 is 356 µm

- The vapour pressure is 9.03 E-4 Pa at 20 °C and 1.78 E-3 at 25 °C.

- The partition coefficient log Pow between n-octanol and water is -1.3 (pH = 2.5)

- The water solubility is 478.8 g/L at 20.0 °C.

- The surface tension of the test substance was not determined because no surface activity is expected in that molecule

- Maleic acid has no dangerous physical-chemical properties.