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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Melting point / freezing point

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Description of key information

Based on the results of independent sources, Merck index 13th ed and Hawley’s  condensed chemical dictionary  11ed, it can be concluded to that the melting point of diphenyl sulphone is 128 °C.

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
128 °C

Additional information

According to the information of independent sources, Merck index 13 th ed  Rahway New jersey Merck Co inc 2006 ref 3365 p 586 and Hawley’s condensed chemical dictionary 11thed p430, it can be concluded that the melting point of diphenyl sulphone is 128°C.