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Physical & Chemical properties

Viscosity

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Reference
Endpoint:
viscosity
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Reference:
Composition 1
Qualifier:
according to
Guideline:
OECD Test Guideline 114 (Viscosity of Liquids)
Deviations:
no
Qualifier:
according to
Guideline:
DIN 53015 (Viscometry - Measurement of viscosity by means of the rolling ball viscometer by Höppler)
Deviations:
no
GLP compliance:
yes (incl. certificate)
Type of method:
rolling ball viscometer (dynamic)
Standard covering the apparatus used:
DIN 53015
Test material information:
Composition 1
Key result
Temp.:
20°C
Parameter:
dynamic viscosity (in mPa s)
Value:
45 326.645
Temp.:
40°C
Parameter:
dynamic viscosity (in mPa s)
Value:
4 516.652

Three determinations at each temperature were performed, since the deviations between the first and the second determination were too high (relative standard deviations (RSD) were 6.4 % for the determination at 20°C and 7.6 % for the determination at 40°C).

For the second and the third determination, the measured RSDs were 1.0% for the determination at 20°C and 0.25% for the determination at 40°C.

The second and the third determination were used for evaluation.

Measurements were performed at 20.0 ± 0.04 °C 40.0 ± 0.1 °C respectively.

No observations arousing doubts concerning the accuracy of the results and the validity of

the study were made.

The validity criteria for the balls used were met for both determinations.

Results of the single determinations with the respective standard deviation as well as the mean value and the standard deviation of all six individual experiments are presented in the attached background material (Table 9.2, BYK-LP X 20954 (WS400402) Viscosity.pdf).

Description of key information

The dynamic viscosity was determined at 20°C and 40°C in a GLP study according to OECD 114 using a rolling ball viscometer (covered by DIN 53015). Results were 45326.645 mPa · s at 20°C and 4516.652 mPa · s at 40°C.

Key value for chemical safety assessment

Viscosity:
45 326.645 mPa · s (dynamic)
at the temperature of:
20 °C

Additional information