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Viscosity

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Reference
Endpoint:
viscosity
Type of information:
experimental study
Adequacy of study:
key study
Study period:
27/03/2015 - 27/03/2015
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Justification for type of information:
Experimental test result performed using standard test guidelines
Qualifier:
according to
Guideline:
OECD Test Guideline 114 (Viscosity of Liquids)
Principles of method if other than guideline:
The viscosity determination of Test item was done as per the test guideline OECD 114 using Redwood Viscometer No. 1.


GLP compliance:
no
Type of method:
other: Redwood Viscometer No. 1
Key result
Temp.:
20°C
Parameter:
dynamic viscosity (in mPa s)
Value:
16.095
Remarks on result:
other: Highly viscous liquid hence required heating
Key result
Temp.:
40°C
Parameter:
dynamic viscosity (in mPa s)
Value:
15.675
Remarks on result:
other: Highly viscous liquid hence required heating
Key result
Temp.:
20°C
Parameter:
kinematic viscosity (in mm²/s)
Value:
14.784
Remarks on result:
other: Highly viscous liquid hence required heating
Key result
Temp.:
40°C
Parameter:
kinematic viscosity (in mm²/s)
Value:
15.675
Remarks on result:
other: Highly viscous liquid hence required heating

TEST DESCRIPTION AND RESULT

Method Details

Observations

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)

57.5 sec

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

56 sec

Density of fluid in gm/cc

1.0603 gm/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

                = 0.264 x 57.5sec

                = 15.18mm2/sec

 

 

 

 

For Test Temperature at 400C

ν=ct

               = 0.264 x 56sec

               = 14.784mm2/s

 

2.      Calculation of Dynamic Viscosities:

 

For Test Temperature at 200C

               ν= η/ρ

               15.18= η/ 1.0603              

η = 15.18 x 1.0603

                 = 16.095mPa.S

 

For Test Temperature at 400C

               ν= η/ρ

              14.784= η/1.0603

               η = 14.784 x 1.0603

                 = 15.675mPa.S

Conclusions:
The viscosity determination of test substance was done as per the test guideline OECD 114 using Redwood Viscometer No. 1.Kinematic viscosity (experimental) of test substance at 20 Deg C and 40 Deg C is 14.784 mm2/sec and 15.675 mm2/s, respectively. Dynamic viscosity (calculated) of test substance at 16.095 mPa.S and 15.675 mPa, respectively.
Executive summary:

The viscosity determination of test substance was done as per the test guideline OECD 114 using Redwood Viscometer No. 1.Kinematic viscosity (experimental) of test substance at 200C and 400C is 14.784 mm2/sec and 15.675 mm2/s, respectively. Dynamic viscosity (calculated) of test substance at 16.095 mPa.S and 15.675 mPa, respectively.

Description of key information

The viscosity determination of test substance was done as per the test guideline OECD 114 using Redwood Viscometer No. 1.Kinematic viscosity (experimental) of test substance at 200C and 400C is 14.784 mm2/sec and 15.675 mm2/s, respectively. Dynamic viscosity (calculated) of test substance at 16.095 mPa.S and 15.675 mPa, respectively.

Key value for chemical safety assessment

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

Additional information

The viscosity determination of test substance was done as per the test guideline OECD 114 using Redwood Viscometer No. 1.Kinematic viscosity (experimental) of test substance at 200C and 400C is 14.784 mm2/sec and 15.675 mm2/s, respectively. Dynamic viscosity (calculated) of test substance at 16.095 mPa.S and 15.675 mPa, respectively.