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Physical & Chemical properties

Viscosity

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Link to relevant study record(s)

Reference
Endpoint:
viscosity
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2011-02-10 to 2011-02-11
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: Guideline study. GLP.
Qualifier:
according to guideline
Guideline:
OECD Test Guideline 114 (Viscosity of Liquids)
Version / remarks:
(12 May 1981)
Deviations:
no
Qualifier:
according to guideline
Guideline:
other: DIN 53015
Deviations:
no
GLP compliance:
yes
Type of method:
other: rolling ball viscosimeter
Temp.:
20°C
Parameter:
dynamic viscosity (in mPa s)
Value:
20 881
Remarks on result:
other: determination 1
Temp.:
20°C
Parameter:
dynamic viscosity (in mPa s)
Value:
18 839
Remarks on result:
other: determination 2
Temp.:
20°C
Parameter:
dynamic viscosity (in mPa s)
Value:
> 17 000
Remarks on result:
other: estimation based on non-Newtonian properties

Visually the test substance was not homogeneous. Around the ball a corona was observed. In both series of measurements the fall time decreased with each repetition. For a Newtonian fluid constant fall times would have been expected. The measured viscosity depended on the history of the test item. However, as the measured viscosity data tend to approach asymptotically an equilibrium value, it seems to be possible to deduce a kind of lower limit for the viscosity of the test substance. Taking the differences of the two series measurements into account a safe estimation results in: The dynamic viscosity at 20°C of the test item is > 17000 mPa s.

Conclusions:
The dynamic viscosity of MDIPA Esterquat C18 unsatd. is > 17000 mPa s at 20°C. The test substance behaves not like a Newtonian fluid.
Executive summary:

The dynamic viscosity od MDIPA Esterquat C18 unsatd was determined according to OECD Guideline 114 (12 May 1981) and DIN 53015 using a rolling ball viscosimeter.

The test substance did not behave like a Newtonian fluid: the measured viscosity depended on the history of the test item. As the measured viscosity data tend to approach asymptotically an equilibrium value, a lower limit for the viscosity of the test substance was deduced. The dynamic viscosity of MDIPA Esterquat C18 unsatd. is > 17000 mPa s at 20°C.

Description of key information

The dynamic viscosity of MDIPA Esterquat C18 unsatd. is > 17000 mPa s at 20°C (OECD Guideline 114/DIN 53015; rolling ball viscosimeter). The substance is not a Newtonian fluid.

Key value for chemical safety assessment

Viscosity:
17 000 mPa · s (dynamic)
at the temperature of:
20 °C

Additional information

The dynamic viscosity od MDIPA Esterquat C18 unsatd was determined according to OECD Guideline 114 (12 May 1981) and DIN 53015 using a rolling ball viscosimeter.

The test substance did not behave like a Newtonian fluid: the measured viscosity depended on the history of the test item. As the measured viscosity data tend to approach asymptotically an equilibrium value, a lower limit for the viscosity of the test substance was deduced. The dynamic viscosity of MDIPA Esterquat C18 unsatd. is > 17000 mPa s at 20°C.