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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
Qualifier:
according to guideline
Guideline:
OECD Test Guideline 114 (Viscosity of Liquids)
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Type of method:
rotational viscometer (dynamic)
Temp.:
20°C
Parameter:
kinematic viscosity (in mm²/s)
Value:
19 000
Remarks on result:
other: Kinematic viscosity. D = 1 to 100 s^-1
Temp.:
40°C
Parameter:
kinematic viscosity (in mm²/s)
Value:
1 600
Remarks on result:
other: Kinematic viscosity. D = 1 to 500 s^-1
Temp.:
20°C
Parameter:
dynamic viscosity (in mPa s)
Value:
21 000
Remarks on result:
other: Dynamic viscosity. D = 1 to 100 s^-1
Temp.:
40°C
Parameter:
dynamic viscosity (in mPa s)
Value:
1 800
Remarks on result:
other: Dynamic viscosity. D = 1 to 500 s^-1

Viscosity determined at 20°C

Shear rate (D) [1/s]

Dynamic Viscosity*

Mean [mPa.s]

Kinematic Viscosity**

Mean [mm2/s]

1.0

21460

18553

2.5

21500

18587

5.0

21533

18616

10

21503

18590

25

21437

18533

50

21340

18449

100

21063

18210

Mean

21000

19000

* Mean values from 2 determinations

** Calculated from unrounded dynamic viscosity values with a density of the test item of ρ = 1.1567 g/cm3(measured with an oscillating densitometer)

Estimated accuracy: ± 5%

Viscosity determined at 40°C

Shear rate (D) [1/s]

Dynamic Viscosity*

Mean [mPa.s]

Kinematic Viscosity**

Mean [mm2/s]

1.0

1787

1565

2.5

1790

1568

5.0

1789

1567

10

1793

1570

25

1794

1571

50

1796

1573

100

1795

1572

250

1789

1566

500

1774

1554

Mean

1800

1600

* Mean values from 2 determinations

** Calculated from unrounded dynamic viscosity values with a density of the test item of ρ = 1.1194 g/cm3(measured with an oscillating densitometer)

Estimated accuracy: ± 5%

Conclusions:
The kinematic viscosity was found to be 19000 mm2/s at 20°C and D (shear rate) = 1 to 100 s-1, and 1600 mm2/s at 40°C and D = 1 to 500 s-1. The dynamic viscosity was found to be 21000 mPa.s at 20°C and D = 1 to 100 s-1, and 1800 mPa.s at 40°C and D = 1 to 500 s-1.
Executive summary:

The viscosity of the test substance was determined in accordance with the OECD Guideline for Testing of Chemicals 114. The dynamic viscosity was measured using the rotational viscosimetry method, with the kinematic viscosity calculated using the dynamic viscosity and the densities. The kinematic viscosity was found to be 19000 mm2/s at 20°C and D (shear rate) = 1 to 100 s-1, and 1600 mm2/s at 40°C and D = 1 to 500 s-1. The dynamic viscosity was found to be 21000 mPa.s at 20°C and D = 1 to 100 s-1, and 1800 mPa.s at 40°C and D = 1 to 500 s-1.

Description of key information

The dynamic viscosity of the test substance was found to be 21000 mPa.s at 20°C and 1800 mPa.s at 40°C. Using the dynamic viscosity and the densities the kinematic viscosity was calculated as 19000 mm^2/s at 20°C and 1600 mm^2/s at 40°C.

Key value for chemical safety assessment

Viscosity:
21 000 mPa · s (dynamic)
at the temperature of:
20 °C

Additional information

A study was conducted to assess the viscosity of the test substance. The study was considered reliable as it was conducted on the registered substance according to OECD Testing Guideline 114. The dynamic viscosity of the test substance was found to be 21000 mPa.s at 20°C and 1800 mPa.s at 40°C. Using the dynamic viscosity and the densities the kinematic viscosity was calculated as 19000 mm2/s at 20°C and 1600 mm2/s at 40°C.