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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:
OECD Test Guideline 114 (Viscosity of Liquids)
GLP compliance:
no
Type of method:
other: Red Wood Viscometer no. 1
Key result
Temp.:
20°C
Parameter:
dynamic viscosity (in mPa s)
Value:
48.045
Key result
Temp.:
40°C
Parameter:
dynamic viscosity (in mPa s)
Value:
33.52
Key result
Temp.:
20°C
Parameter:
kinematic viscosity (in mm²/s)
Value:
42.484
Key result
Temp.:
40°C
Parameter:
kinematic viscosity (in mm²/s)
Value:
29.64

Observation Table :              

Method Details

Observations

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)

 

172

 

Time taken to fill 50ml at 40°C

flask in ‘Sec’ (Mean Value)

 

120

 

 

Density of fluid in gm/cc

1.1309

 

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

 

Calculation of Kinematic Viscosities:

For Test Temperature at 20 °C

ν=ct

= 172 × 0.247sec

= 42.4840mm²/sec

For Test Temperature at 40°C

ν=ct

= 120 × 0.247sec

 

= 29.6400 mm²/sec

 

 

Calculation of Dynamic Viscosities:

For Test Temperature at 20°C

ν= η/ρ

42.4840 =η 1.1309

η = 42.4840 x 1.1309

= 48.0451 mPa.S

 

For Test Temperature at 40°C

ν= η/ρ

29.6400 =η/ 1.1309

η = 29.6400 x 1.1309

= 33.5198 mPa.S

Conclusions:
Dynamic viscosity of test chemical was calaculated to be 48.0451 mPa.S at 20°C and 33.5198 mPa.S at 40 °C and kinematic viscosity (experimental) was determined to be 42.4840 mm²/sec at 20°C and 29.6400 mm²/sec at 40°C.
Executive summary:

The viscosity of test chemical was determined as per the test guideline OECD 114 using Redwood Viscometer No. 1

Dynamic viscosity of test chemical  was calculated to be 48.0451 mPa.S at 20°C and 33.5198 mPa.S at 40 °C and kinematic viscosity (experimental) was determined to be 42.4840 mm²/sec at 20°C and 29.6400 mm²/sec at 40°C.

Description of key information

The viscosity of test chemical was determined as per the test guideline OECD 114 using Redwood Viscometer No. 1

Dynamic viscosity of test chemical  was calculated to be 48.0451 mPa.S at 20°C and 33.5198 mPa.S at 40 °C and kinematic viscosity (experimental) was determined to be 42.4840 mm²/sec at 20°C and 29.6400 mm²/sec at 40°C.

Key value for chemical safety assessment

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

Additional information

The viscosity of test chemical was determined as per the test guideline OECD 114 using Redwood Viscometer No. 1

Dynamic viscosity of test chemical  was calculated to be 48.0451 mPa.S at 20°C and 33.5198 mPa.S at 40 °C and kinematic viscosity (experimental) was determined to be 42.4840 mm²/sec at 20°C and 29.6400 mm²/sec at 40°C.