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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
Study period:
2017-01-13 – 2017-01-13
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Justification for type of information:
Data is from study report
Qualifier:
according to guideline
Guideline:
OECD Test Guideline 114 (Viscosity of Liquids)
Principles of method if other than guideline:
The flow of test item under gravity through a capillary using Redwood Viscometer No. 1
GLP compliance:
not specified
Type of method:
capillary viscometer (static)
Temp.:
20°C
Parameter:
kinematic viscosity (in mm²/s)
Value:
20.14
Temp.:
40°C
Parameter:
kinematic viscosity (in mm²/s)
Value:
14.41
Temp.:
20°C
Parameter:
dynamic viscosity (in mPa s)
Value:
21.29
Temp.:
40°C
Parameter:
dynamic viscosity (in mPa s)
Value:
15.23

CALCULATIONS:

ν= ct----------------------------------------- (i)

Where, ν= Kinematic viscosity

c= Viscometer constant

t= time of flow in seconds (Redwood second) For Redwood Viscometer- I, the values for the constants are as

below:

Time of flow, t

C

40 to 85 seconds

0.264

85 to 2000

0.247

ν= η/ρ------------------------------ (ii)

Where, ν= Kinematic viscosity

η= Dynamic viscosity

ρ= Density of fluid

1. Calculation of Kinematic Viscosities:

For Test Temperature at 20°C

ν=ct

= 76.3 × 0.264sec

= 20.14mm²/sec

For Test Temperature at 40°C

ν=ct

= 54.6 × 0.264sec

= 14.41 mm²/sec

2. Calculation of Dynamic Viscosities:

For Test Temperature at 20°C

ν= η/ρ

20.14 =η 1.057

η = 20.14 x 1.057

= 21.29 mPa.S

For Test Temperature at 40°C

ν= η/ρ

14.41 =η/ 1.057

η = 14.41 x 1.057

= 15.23 mPa.S

Conclusions:
Kinematic viscosity (experimental) of test item at 20°C and 40°C is 20.14mm²/secand 14.41mm²/s,respectively.
Dynamic viscosity (calculated) of test item at 20°C and 40°C is 21.29mPa.Sand 15.23mPa.S, respectively.
Executive summary:

Kinematic viscosity (experimental) of test item at 20°C and 40°C is 20.14mm²/secand 14.41mm²/s,respectively.

Dynamic viscosity (calculated) of test item at 20°C and 40°C is 21.29mPa.Sand 15.23mPa.S, respectively.

Description of key information

Kinematic viscosity (experimental) of test item at 20°C and 40°C is 20.14mm²/secand 14.41mm²/s,respectively.

Dynamic viscosity (calculated) of test item at 20°C and 40°C is 21.29mPa.Sand 15.23mPa.S, respectively.

Key value for chemical safety assessment

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

Additional information

Kinematic viscosity (experimental) of test item at 20°C and 40°C is 20.14mm²/secand 14.41mm²/s,respectively.

Dynamic viscosity (calculated) of test item at 20°C and 40°C is 21.29mPa.Sand 15.23mPa.S, respectively.