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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

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Physical & Chemical properties


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Description of key information

The viscosity of 2-methylpropane-2-thiol was determined to be 1.60 mPas at 20˚C and 1.29 mPas at 40˚C at a constant shear rate of 2000 l/s.

Key value for chemical safety assessment

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

Additional information

The results have been taken from Fieseler (2009), a GLP study with a rotational viscometer, following OECD guideline 114 and therefore can be considered reliable and a suitable key study for this endpoint. Because the viscosity at different shear rates did not vary more than +/- 0.8 mPas, the measurements were performed at a constant shear rate of 2000 l/s.