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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Viscosity

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Administrative data

Link to relevant study record(s)

Description of key information

One key study on phosphinic acid 60% in aqueous solution was performed at 20°C and 40°C according to the OECD Method No. 114. 
The interpolated viscosity values did not vary with the shear rate within the limits of the accuracy of the measurement indicating that phosphinic acid is a Newtonian fluid.

Key value for chemical safety assessment

Viscosity:
4.7 mPa · s (dynamic)
at the temperature of:
20 °C

Additional information

One key study is available in which the viscosity of phosphinic acid at 60% in aqueous solution was determined at 20°C and 40°C according to the OECD Method No. 114 using a rotating cylinder viscometer.The viscosity was measured over a shear rate range from 5 s-1to 2025 s-1at 20 °C and at 40 °C. The interpolated viscosity values did not vary with the shear rate within the limits of the accuracy of the measurement, e.g. at 20 °C from 4.7 mPa·s at 900 s-1 to 4.7 mPa·s at 2025 s-1 and at 40 °C from 3.4 mPa·s at 900 s-1 to  3.5 mPa·s at 2025 s-1, indicating that phosphinic acid 60% aqueous solution is a Newtonian fluid.