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Viscosity

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Reference
Endpoint:
viscosity
Type of information:
experimental study
Adequacy of study:
key study
Study period:
07-09-2017 – 07-09-2017
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 chemicalwas 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:
21.161
Remarks on result:
other: Highly viscous liquid hence required heating
Key result
Temp.:
40°C
Parameter:
dynamic viscosity (in mPa s)
Value:
16.301
Remarks on result:
other: Highly viscous liquid hence required heating
Key result
Temp.:
20°C
Parameter:
kinematic viscosity (in mm²/s)
Value:
14.942
Remarks on result:
other: Highly viscous liquid hence required heating
Key result
Temp.:
40°C
Parameter:
kinematic viscosity (in mm²/s)
Value:
11.51
Remarks on result:
other: Highly viscous liquid hence required heating

Observation Table :              

    Method Details  Observations  Remarks if, any
 Guideline  OECD 114    

Method of

measurement

 Redwood Viscometer No. -1

 

 

 Principle of method

 The flow of test item under gravity

through a capillary using Redwood

Viscometer No. 1

   

 Temperature at which

the testing was done

40°C and 60°C 

 

 

 Observations      

    Time taken to fill 50ml flask at

20°C in ‘Sec’ (Mean Value)

56.6 sec    

 Time taken to fill 50ml at 40°C

flask in ‘Sec’ (Mean Value)

43.6 sec 

 Density of fluid in gm/cc

  1.4162 gm/cc

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

= 56.6 × 0.264sec

= 14.9424mm²/sec

For Test Temperature at 40°C

ν=ct

= 43.6 × 0.264sec

= 11.5104 mm²/sec

2. Calculation of Dynamic Viscosities:

For Test Temperature at 20°C

ν= η/ρ

14.9424 =η 1.4162

η = 14.9424 x 1.4162

= 21.1614 mPa.S

For Test Temperature at 40°C

ν= η/ρ

11.5104 =η/ 1.4162

η = 11.5104 x 1.4162

= 16.3010 mPa.S

Conclusions:
Dynamic viscosity (calculated) of test chemical at 20 0C and 40 0C is 21.1614 mPa.S and 16.3010 mPa.S, respectively.
Executive summary:

The viscosity determination of test substance was done as per the test guideline OECD 114 using Redwood Viscometer No. 1. Dynamic viscosity (calculated) of test chemical at 20 0C and 40 0C is 21.1614m Pa.S and 16.3010m Pa.S, respectively.

Description of key information

Dynamic viscosity (calculated) of test chemical at 20 0C and 40 0C is 21.1614 mPa.S and 16.3010 mPa.S,  respectively.  

Key value for chemical safety assessment

Viscosity:
21.161 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. Dynamic viscosity (calculated) of test chemical at 20 0C and 40 0C is 21.1614m Pa.S and 16.3010m Pa.S, respectively.