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Diss Factsheets

Physical & Chemical properties

Viscosity

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Administrative data

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Reference
Endpoint:
viscosity
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
guideline study with acceptable restrictions
Qualifier:
according to guideline
Guideline:
other: Ubbelohde
Principles of method if other than guideline:
The determination of the kinematic viscosity was carried out by the capillary method with a viscosimeter according to Ubbelohde.

For a specific liquid volume of the test item the flow time is measured through a capillary under the influence of gravity. The measurement is carried out at a specific temperature. The results are given in mm2/s.

The method is applicable to liquids with a kinematic viscosity between approx. 0.5 and 10^5 mm2/s
GLP compliance:
no
Type of method:
capillary viscometer (static)
Key result
Temp.:
20°C
Parameter:
kinematic viscosity (in mm²/s)
Value:
1.294



























































Temperature



20°C



40°C



1st run



399.98



295.67



2nd run



400.94



295.69



3rd run



399.74



295.69



4th run



399.73



295.70



5th run



399.76



295.71



Mean value of flow time [s]



400.030



295.692



Hagenbach correction [s]



0.408



0.747



Corrected flow time [s]



399.622



294.945



Viscosimeter constant [mm2/s2]



0.003239



0.003239



Kinematic viscosity [mm2/s]



1.2944



0.9553


Conclusions:
A kinematic viscosity of 1.2944 at 20°C was determined using the capillary method in accordance with Ubbelonhde. This result is considered to be reliable.

Description of key information

Viscosity: 1.2944 mm2/s at 20°C (Capillary method)

Key value for chemical safety assessment

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

Additional information

A kinematic viscosity of 1.2944 at 20°C was determined for the substance using the capillary method (Ubbelonhde). The result is considered to be reliable and is selected as key study.


 


The key result is supported by a predicted kinematic viscosity value of 1.6 mm2/s at 20°C which was determined for the substance using a validated QSAR estimation method.


 


In available secondary sources to which reliability could not be assigned, viscosity values of 1.4 mPa·s (dynamic) at 20°C and 1.2 mPa·s (dynamic) at 25°C were reported for the substance.