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EC number: 204-694-8
CAS number: 124-28-7
Values are the means from two trials (with 12 runs each). While the
standard error of the means (0.015 mPa s at 30°C and 0.027 mPa s at
50°C) indicates good reproducibility, the general experience with the
rheometer indicates that the uncertainty of viscosity values is unlikely
to be better than ±2.5%. This value, which is larger than the standard
error of the mean, has been used as the basis for the uncertainty quoted
The best estimates for the dynamic viscosity of the test substance are:
at 30°C: 6.55 ± 0.16 mPa.s
at 50°C: 4.09 ± 0.10 mPa.s
The best estimates for the kinematic viscosity of the test substance are:
at 30 °C: 8.19 ± 0.20 mm2/s
at 50 °C: 5.20 ± 0.13 mm2/s
The test substance shows Newtonian behaviour, i.e. no significant effect
of shear rate.
The measurement was made with a cylinder geometry, which is suitable for
low viscosities. The rotational viscometer has been chosen, since it is
the only method allowing to easily check if the liquid shows Newtonian
behavior (and is in fact the only one allowing to determine the
viscosity of non-Newtonian liquids). While the OECD Guideline specifies
a general quality criterion for the lower end of the rotational
viscometer method of 10 mPa.s, the specific instrument used in the
measurements (ThermoHaake RS1 rheometer) has - according to its
manufacturer - an applicability range starting at 1 mPa.s. The results
obtained in this study are above this value and are therefore considered
The viscosity of the test substance was determined according to the OECD
The dynamic viscosity at 30 °C is 6.55 mPa.s and the kinematic viscosity
at 50 °C is 5.20 mm2/s
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