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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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


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Administrative data

Link to relevant study record(s)

Description of key information

The standard information requirement for viscosity at 20 °C is waived, on the basis that the substance is a solid at this temperature.  The measured dynamic viscosities of molten biphenyl decrease with increasing temperature, and range from 0.95 mPa*sec to 0.32 mPa*sec over the temperature range of 100 - 225 °C

Key value for chemical safety assessment

Additional information

The standard information requirement for REACH is a determination of viscosity at 20°C. Because biphenyl is a solid at room temperature, measurement is not feasible. Therefore, any further testing can be waived. However, since biphenyl is predominantly used as a liquid at higher temperatures, the viscosity values reported by Hedley et al. (1970) are considered relevant for the dossier.