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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
Justification for type of information:
Experimental test result performed using standard OECD test guidelines.
Qualifier:
according to
Guideline:
OECD Test Guideline 114 (Viscosity of Liquids)
Principles of method if other than guideline:
The viscosity of test substance was determined as per the test guideline OECD 114, using method Redwood Viscometer No. 1.
GLP compliance:
not specified
Type of method:
other: Redwood Viscometer No. 1
Key result
Temp.:
20°C
Parameter:
kinematic viscosity (in mm²/s)
Value:
30.381
Remarks on result:
other: no other details mentioned
Key result
Temp.:
40°C
Parameter:
kinematic viscosity (in mm²/s)
Value:
19.14
Remarks on result:
other: no other details mentioned
Key result
Temp.:
20°C
Parameter:
dynamic viscosity (in mPa s)
Value:
31.9
Remarks on result:
other: no other details mentioned
Key result
Temp.:
40°C
Parameter:
dynamic viscosity (in mPa s)
Value:
20.097
Remarks on result:
other: no other details mentioned

TEST DESCRIPTION AND RESULT

Details

Readings

Remarks if, any

Guideline

OECD - 114

 

 

Method of measurement

Redwood Viscometer No. -1

 

Principle of method

Measurement of resistance to flow using RedwoodViscometer No. 1

 

Temperature at which the testing is done

20 °C and 40 °C

 

 

 

Observations

Time taken to fill 50ml flask at 20 °C in ‘Sec’ (Mean Value)

123 sec

Time taken to fill 50ml at 40 °C flask in ‘Sec’ (Mean Value)

72.5 sec

Density of fluid in gm/cc

1.05gm/cc

 

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 200C

ν=ct

 = 0.247x123

 = 30.381mm2/s

 

For Test Temperature at 400C

ν=ct

 = 0.264x72.5

 = 19.14mm2/s

 

2.      Calculation of Dynamic Viscosities:

 

For Test Temperature at 200C

               ν= η/ρ

               30.381= η/1.05

               η = 30.381x1.05

                 = 31.90mPa.S

 

For Test Temperature at 400C

               ν= η/ρ

               19.14= η/1.05

               η = 19.14x1.05

                 = 20.097mPa.S

 

Result:

 

Sr. No.

Temperature of Sample

Time taken to fill the 50 ml of flask in ‘seconds’ (Mean value)

Kinematic Viscosity in mm2/s

Density in gm/cc

Dynamic (or) Absolute Viscosity mPa.S

1.

 

200C

123 sec

30.381mm2/s

1.05

31.90mPa.S

2.

 

400C

72.5 sec

19.14mm2/s

1.05

20.097mPa.S

 

Conclusions:
Kinematic viscosity (experimental) of test chemical at 20°C and 40°C is 30.381mm2/s and 19.14mm2/s, respectively. Dynamic viscosity (calculated) of mixture of ionone at 20°C and 40°C is 31.90mPa.S and 20.097mPa.S, respectively.
Executive summary:

The viscosity determination of test substance was done as per the test guideline OECD 114. The method followed was according to Redwood Viscometer No. 1. Kinematic viscosity (experimental) of test substance at 20 °C and 40 °C is 30.381 mm2/sec and 19.14 mm2/s, respectively. Dynamic viscosity (calculated) of test substance at 20 °C and 40 °C is 31.90 mPa.S and 20.097mPa.S, respectively.

Description of key information

The viscosity determination of test substance was done as per the test guideline OECD 114. The method followed was according to Redwood Viscometer No. 1. Kinematic viscosity (experimental) of test substance at 20 °C and 40 °C is 30.381 mm2/sec and 19.14 mm2/s, respectively. Dynamic viscosity (calculated) of test substance at 20 °C and 40 °C is 31.90 mPa.S and 20.097mPa.S, respectively.

Key value for chemical safety assessment

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

Additional information

The viscosity determination of test substance was done as per the test guideline OECD 114. The method followed was according to Redwood Viscometer No. 1. Kinematic viscosity (experimental) of test substance at 20 °C and 40 °C is 30.381 mm2/sec and 19.14 mm2/s, respectively. Dynamic viscosity (calculated) of test substance at 20 °C and 40 °C is 31.90 mPa.S and 20.097mPa.S, respectively.