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Viscosity

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Reference
Endpoint:
viscosity
Type of information:
experimental study
Adequacy of study:
key study
Study period:
24-04-2017 – 24-04-2017
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Justification for type of information:
Experimental result performed using standard methods of analysis
Qualifier:
according to
Guideline:
OECD Test Guideline 114 (Viscosity of Liquids)
Principles of method if other than guideline:
Measurement of resistance to flow using Redwood Viscometer No. 1.

GLP compliance:
no
Type of method:
other: Redwood Viscometer No. 1
Key result
Temp.:
20°C
Parameter:
kinematic viscosity (in mm²/s)
Value:
20.856
Remarks on result:
other: not specified
Key result
Temp.:
40°C
Parameter:
kinematic viscosity (in mm²/s)
Value:
17.239
Remarks on result:
other: not specified
Key result
Temp.:
20°C
Parameter:
dynamic viscosity (in mPa s)
Value:
18.157
Remarks on result:
other: not specified
Key result
Temp.:
40°C
Parameter:
dynamic viscosity (in mPa s)
Value:
15.008
Remarks on result:
other: not specified

Method Details

Observations

Remarks if, any

Guideline

OECD 114

 

Method of

measurement

Redwood Viscometer No. -1

 

Principle of method

The flow of chemical under gravity through a capillary using Redwood Viscometer 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)

79 sec

 

Time taken to fill 50ml at 40°C

flask in ‘Sec’ (Mean Value)

65.3 sec

 

Density of fluid in gm/cc

0.8706 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 20°C

ν=ct

= 79 × 0.264sec

= 20.8560mm²/sec

 

For Test Temperature at 40°C

ν=ct

= 65.3 × 0.264sec

= 17.2392 mm²/sec

 

2. Calculation of Dynamic Viscosities:

For Test Temperature at 20°C

ν= η/ρ

20.8560 =η 0.8706

η = 20.8560 x 0.8706

= 18.1572 mPa.S

 

For Test Temperature at 40°C

ν= η/ρ

17.2392 =η/ 0.8706

η = 17.2392 x 0.8706

= 15.0084 mPa.S

Conclusions:
The viscosity determination of test chemical 3,7-dimethyloct-6-enyl isobutyrate was done as per the test guideline OECD 114 using Redwood Viscometer No. 1. Kinematic viscosity (experimental) of Test item at 20°C and 40°C is 20.8560 mm²/sec and 17.2392 mm²/s, respectively. Dynamic viscosity (calculated) of Test item 3,7-dimethyloct-6-enyl isobutyrate at 20°C and 40°C is 18.1572 mPa.S and 15.0084 mPa.S, respectively.
Executive summary:

The viscosity determination of test chemical 3,7-dimethyloct-6-enyl isobutyrate was done as per the test guideline OECD 114 using Redwood Viscometer No. 1. Kinematic viscosity (experimental) of Test item at 20°C and 40°C is 20.8560 mm²/sec and 17.2392 mm²/s, respectively. Dynamic viscosity (calculated) of Test item 3,7-dimethyloct-6-enyl isobutyrate at 20°C and 40°C is 18.1572 mPa.S and 15.0084 mPa.S, respectively.

Description of key information

The viscosity determination of test chemical was done as per the test guideline OECD 114 using Redwood Viscometer No. 1. Kinematic viscosity (experimental) of Test item at 20°C and 40°C is 20.8560 mm²/sec and 17.2392 mm²/s, respectively. Dynamic viscosity (calculated) of Test item at 20°C and 40°C is 18.1572 mPa.S and 15.0084 mPa.S, respectively.

Key value for chemical safety assessment

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

Additional information

The viscosity determination of test chemical was done as per the test guideline OECD 114 using Redwood Viscometer No. 1. Kinematic viscosity (experimental) of Test item at 20°C and 40°C is 20.8560 mm²/sec and 17.2392 mm²/s, respectively. Dynamic viscosity (calculated) of Test item at 20°C and 40°C is 18.1572 mPa.S and 15.0084 mPa.S, respectively.