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Viscosity

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Reference
Endpoint:
viscosity
Type of information:
experimental study
Adequacy of study:
key study
Study period:
11/02/2015
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
Guideline:
OECD Test Guideline 114 (Viscosity of Liquids)
Principles of method if other than guideline:
The viscosity determination of test substance 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
Specific details on test material used for the study:
- Name of test material (IUPAC name): 4-(5,5,6-trimethylbicyclo[2.2.1]hept-2-yl)cyclohexan-1-ol
- Molecular formula: C16H28O
- Molecular weight: 236.396 g/mol
- Smiles notation: OC1CCC([C@@H]2[C@@H]3C[C@@H](C(C)(C)[C@@H]3C)C2)CC1
- InChl: 1S/C16H28O/c1-10-14-8-12(16(10,2)3)9-15(14)11-4-6-13(17)7-5-11/h10-15,17H,4-9H2,1-3H3
- Substance type: Organic
- Physical state: liquid
Key result
Temp.:
other: 80°C
Parameter:
dynamic viscosity (in mPa s)
Value:
72.803
Remarks on result:
other: Highly viscous liquid hence required heating
Key result
Temp.:
other: 100°C
Parameter:
dynamic viscosity (in mPa s)
Value:
29.48
Remarks on result:
other: Highly viscous liquid hence required heating
Key result
Temp.:
other: 80°C
Parameter:
kinematic viscosity (in mm²/s)
Value:
74.1
Remarks on result:
other: Highly viscous liquid hence required heating
Key result
Temp.:
other: 100°C
Parameter:
kinematic viscosity (in mm²/s)
Value:
30.01
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)

300sec    

 Time taken to fill 50ml at 40°C

flask in ‘Sec’ (Mean Value)

121.5sec 

 Density of fluid in gm/cc

  0.9825 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 800C

               ν=ct

                = 0.247 x 300 sec

                = 74.1mm2/sec

 

For Test Temperature at 1000C

ν=ct

               = 0.247 x 121.5sec

               = 30.01mm2/s

 

2.      Calculation of Dynamic Viscosities:

 

For Test Temperature at 800C

               ν= η/ρ

               74.1 = η/ 0.9825

η = 74.1 x 0.9825 

                 = 72.803mPa.S

 

For Test Temperature at 1000C

               ν= η/ρ

              30.01 = η/0.9825

               η = 30.01 x 0.9825

                 = 29.48mPa.S

 

Conclusions:
Kinematic viscosity (experimental) of test chemical at 80 0C and 100 0C is 74.1 mm2/sec and 30.01 mm2/s, respectively.
Dynamic viscosity (calculated) of test chemical at 80 0C and 100 0C is 72.803 mPa.S and 29.48 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.Kinematic viscosity (experimental) of test substance at 800C and 1000C is 74.1 mm2/sec and 30.01 mm2/s, respectively. Dynamic viscosity (calculated) of test substance at 72.803 mPa.S and 29.48 mPa, respectively.

Description of key information

Kinematic viscosity (experimental) of test chemical at 80 0C and 100 0C is 74.1 mm2/sec and 30.01 mm2/s, respectively.

Dynamic viscosity (calculated) of test chemical at 80 0C and 100 0C is 72.803 mPa.S and 29.48 mPa.S, respectively.  

Key value for chemical safety assessment

Viscosity:
72.803 mPa · s (dynamic)
at the temperature of:
80 °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 800C and 1000C is 74.1 mm2/sec and 30.01 mm2/s,respectively. Dynamic viscosity (calculated) of test substance at 72.803 mPa.S and 29.48 mPa.s, respectively.

From authoritative databases Viscosity of test chemical is determine to be 109.224 mPa*s at temperature 35 °C.

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