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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
Justification for type of information:
Experimental test result performed using standard test guidelines
Qualifier:
according to guideline
Guideline:
OECD Test Guideline 114 (Viscosity of Liquids)
GLP compliance:
no
Type of method:
other: Redwood Viscometer No. 1
Key result
Temp.:
20°C
Parameter:
dynamic viscosity (in mPa s)
Value:
46.89
Key result
Temp.:
40°C
Parameter:
dynamic viscosity (in mPa s)
Value:
43.225
Key result
Temp.:
20°C
Parameter:
kinematic viscosity (in mm²/s)
Value:
34.458
Key result
Temp.:
40°C
Parameter:
kinematic viscosity (in mm²/s)
Value:
31.764

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)

175 sec    

Time taken to fill 50ml at 40°C

flask in ‘Sec’ (Mean Value)

128.6 sec 

 Density of fluid in gm/cc

 1.0848 gm/cc

1. Calculation of Kinematic Viscosities:

For Test Temperature at 20 °C

ν=ct

= 175 × 0.247sec

= 43.2250mm²/sec

For Test Temperature at 40°C

ν=ct

= 128.6 × 0.247sec

= 31.7642 mm²/sec

2. Calculation of Dynamic Viscosities:

For Test Temperature at 20°C

ν= η/ρ

43.2250 =η 1.0848

η = 43.2250 x 1.0848

= 46.8904 mPa.S

For Test Temperature at 40°C

ν= η/ρ

31.7642 =η/ 1.0848

η = 31.7642 x 1.0848

= 34.4578 mPa.S

Conclusions:
Under the test system, the kinematic viscosity (experimental) at 20°C and 40°C was determined to be 43.2250 mm²/sec and 31.7642 mm²/s, respectively. The dynamic viscosity (calculated) at 20°C and 40°C was determined to be 46.8904 mPa.S and 34.4578 mPa.S, respectively.
Executive summary:

A study was performed to determine the viscosity of test chemical at specified temperature of 20°C and 40°C. The study was conducted in accordance with OECD 114. The kinematic viscosity (experimental) at 20°C and 40°C was determined to be 43.2250 mm²/sec and 31.7642 mm²/s, respectively. The dynamic viscosity (calculated) at 20°C and 40°C was determined to be 46.8904 mPa.S and 34.4578 mPa.S, respectively.

Description of key information

A study was performed to determine the viscosity of test chemical at specified temperature of 20°C and 40°C. The study was conducted in accordance with OECD 114. The kinematic viscosity (experimental) at 20°C and 40°C was determined to be 43.2250 mm²/sec and 31.7642 mm²/s, respectively. The dynamic viscosity (calculated) at 20°C and 40°C was determined to be 46.8904 mPa.S and 34.4578 mPa.S, respectively.

Key value for chemical safety assessment

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

Additional information

A study was performed to determine the viscosity of test chemical at specified temperature of 20°C and 40°C. The study was conducted in accordance with OECD 114. The kinematic viscosity (experimental) at 20°C and 40°C was determined to be 43.2250 mm²/sec and 31.7642 mm²/s, respectively. The dynamic viscosity (calculated) at 20°C and 40°C was determined to be 46.8904 mPa.S and 34.4578 mPa.S, respectively.