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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Link to relevant study record(s)

Description of key information

The melting point of biphenyl was determined experimentally to be 69.5 °C (342.6 K) using differential scanning calorimetry.  Measurements reported in supporting studies give values ranging from 68-70 °C. 

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
342.6 K

Additional information

A measured melting point value of 342.6 K (69.5 °C) determined in the Key Study by Miller et al.(1984) is consistent with several other reported measured values in the supporting studies/references listed, and with the critically-evaluated and accepted value of 69.05 °C reported in the AIChE DIPPR database (v5.2.2, 2011).