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Viscosity

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Reference
Endpoint:
viscosity
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2010
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
test procedure in accordance with generally accepted scientific standards and described in sufficient detail
Qualifier:
no guideline followed
Principles of method if other than guideline:
The viscosity of the liquids is measured using a stress-controlled rotational rheometer (Paar-Physica UDS 200) fitted with a concentric cylinder system
GLP compliance:
not specified
Type of method:
rotational viscometer (dynamic)
Key result
Temp.:
other: 23.0°C
Parameter:
dynamic viscosity (in mPa s)
Value:
ca. 21 200
Remarks on result:
other: at shear rate of 1 per sec
Key result
Temp.:
other: 23.0°C
Parameter:
dynamic viscosity (in mPa s)
Value:
ca. 21 100
Remarks on result:
other: at shear rate of 10 per sec
Key result
Temp.:
other: 23.0°C
Parameter:
dynamic viscosity (in mPa s)
Value:
ca. 21 000
Remarks on result:
other: at shear rate of 100 sec

Results:

 

Sample #

Viscosity at

1 s-1

Viscosity at

10 s-1

Viscosity at

100 s-1

Temperature

DPHA

21.2 Pa.s

21.1 Pa-s

21.0 Pa-s

23.0°C

Conclusions:
Under the study conditions, the viscosity of the test substance was found to be 21.2, 21.1 and 21.0 Pa-s at the shear-rate of 1, 10 and 100 per sec, respectively at 23 °C.
Executive summary:

A study was conducted to determine the viscosity of the test substance DPHA using a stress-controlled rotational rheometer (Paar-Physica 200) fitted with a concentric cylinder system. A few measurements are conducted over a shear rate range between 1 and 100 s-1. Under the study conditions, the viscosity of the test substance was found to be 21.2, 21.1 and 21.0 Pa-s at the shear-rate of 1, 10 and 100 per sec, respectively at 23 °C (Herssens, 2010).

Description of key information

The viscosity of test substance was determined using a stress-controlled rotational rheometer (Paar-Physica 200) fitted with a concentric cylinder system (Herssens, 2010). 

Key value for chemical safety assessment

Viscosity:
21 200 mPa · s (dynamic)
at the temperature of:
23 °C

Additional information

The viscosity of the test substance was found to be 21.2, 21.1 and 21.0 Pa-s at the shear-rate of 1, 10 and 100 per sec, respectively at 23 °C (Herssens, 2010).

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