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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Viscosity (tetrapropyl orthosilicate): 1.51 mm²/s (kinematic) (OECD 114)

Key value for chemical safety assessment

1.51 mm²/s (static)
at the temperature of:
20 °C

Additional information

Two reliable data are available for the viscosity of tetrapropyl orthosilicate. A kinematic viscosity value of 1.51 mm²/s was determined for the substance using an appropriate OECD test method. The result is considered reliable and selected as key study. In other available data used as supporting study, a dynamic viscosity value of 1 mPa · s was determined for the test substance using a relevant test method. The supporting study is in good agreement with the key study. The study recently conducted was selected as the key study.