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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

The viscosity of isobutyl-R-lactate, as extrapolated from the optical antipode isobutyl-S-lactate, is 3.5 mm²/s at 20.0 °C and 2.0 mm²/s at 40.0 °C.

Key value for chemical safety assessment

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

Additional information

The viscosity of (S) isobutyl-lactate was evaluated in a GLP study according to OECD guideline 214 at 20.0 °C and 40.0 °C test temperature. At 20 °C both runs revealed a flow time of 1178 s and at 40 °C of 677 and 674 s, respectively, corresponding to kinetic viscosities of 3.5 and 2.0 mm²/s, respectively, considering a viscosity constant of 0.003. This result can be extrapolated to the target substance isobutyl-(R)-lactate without restrictions, since being the optical antipode.