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Viscosity

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Reference
Endpoint:
viscosity
Type of information:
experimental study
Adequacy of study:
key study
Study period:
12-12-2017 – 12-12-2017
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 item 2-[[4-[ethyl(2-hydroxyethyl)amino]phenyl]azo]-6-methoxy-3-methylbenzothiazolium acetate (CAS No. 84051-87-6 )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 : 2-[[4-[ethyl(2-hydroxyethyl)amino]phenyl]azo]-6-methoxy-3-methylbenzothiazolium acetate
- Molecular formula: C19H23N4O2S.C2H3O2
- Molecular weight: 430.5264 g/mol
- SMILES: CCN(CCO)c1ccc(cc1)/N=N/c2[n+](c3ccc(cc3s2)OC)C.CC(=O)[O-]
- InChI: 1S/C19H23N4O2S.C2H4O2/c1-4-23(11-12-24)15-7-5-14(6-8-15)20-21-19-22(2)17-10-9-16(25-3)13-18(17)26-19;1-2(3)4/h5-10,13,24H,4,11-12H2,1-3H3;1H3,(H,3,4)/q+1;/p-1
- Substance type: Organic
- Physical state: Liquid
- Batch no.: YPA-2016
- Physical Appearance: free flowing blue liquid
- Stability: Stable in recommended storage conditions
- Storage Conditions: 1. Ambient Temp (23 to 27 °C) √ (Store in a cool place. Keep containers tightly closed in a dry and well ventilated place)
Key result
Temp.:
20°C
Parameter:
dynamic viscosity (in mPa s)
Value:
24.521
Remarks on result:
other: Highly viscous liquid hence required heating
Key result
Temp.:
40°C
Parameter:
dynamic viscosity (in mPa s)
Value:
21.492
Remarks on result:
other: Highly viscous liquid hence required heating
Key result
Temp.:
20°C
Parameter:
kinematic viscosity (in mm²/s)
Value:
19.879
Remarks on result:
other: Highly viscous liquid hence required heating
Key result
Temp.:
40°C
Parameter:
kinematic viscosity (in mm²/s)
Value:
17.424
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)

75.3sec    

 Time taken to fill 50ml at 40°C

flask in ‘Sec’ (Mean Value)

66sec 

 Density of fluid in gm/cc

  1.2335 gm/cc

1. Calculation of Kinematic Viscosities:

For Test Temperature at 20°C

ν=ct

= 75.3 × 0.264sec

= 19.8792mm²/sec

For Test Temperature at 40°C

ν=ct

= 66 × 0.264sec

= 17.4240 mm²/sec

2. Calculation of Dynamic Viscosities:

For Test Temperature at 20°C

ν= η/ρ

19.8792 =η 1.2335

η = 19.8792 x 1.2335

= 24.5209 mPa.S

For Test Temperature at 40°C

ν= η/ρ

17.4240 =η/ 1.2335

η = 17.4240 x 1.2335

= 21.4925 mPa.S

Conclusions:
Kinematic viscosity (experimental) of 2-[[4-[ethyl(2-hydroxyethyl)amino]phenyl]azo]-6-methoxy-3-methylbenzothiazolium acetate( CAS No. 84051-87-6)at 20°C and 40°C was 19.8792 mm²/sec and 17.4240 mm²/s, respectively.
Dynamic viscosity (calculated) of 2-[[4-[ethyl(2-hydroxyethyl)amino]phenyl]azo]-6-methoxy-3- methylbenzothiazolium acetate( CAS No. 84051-87-6)at 20°C and 40°C was 24.5209 mPa.S and 21.4925 mPa.S, respectively.
Executive summary:

The viscosity determination of Test item 2 -[[4 -[ethyl(2 -hydroxyethyl)amino]phenyl]azo]-6 -methoxy-3 -methylbenzothiazolium acetate (CAS No. 84051 -87 -6 )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 was19.8792 mm²/sec and 17.4240 mm²/s, respectively. Dynamic viscosity (calculated) of Test item at 20°C and 40°C was 24.5209 mPa.S and 21.4925 mPa.S, respectively.

Description of key information

Kinematic viscosity (experimental) of 2-[[4-[ethyl(2-hydroxyethyl)amino]phenyl]azo]-6-methoxy-3-methylbenzothiazolium acetate( CAS No. 84051-87-6)at 20°C and 40°C was 19.8792 mm²/sec and 17.4240 mm²/s, respectively.

Dynamic viscosity (calculated) of 2-[[4-[ethyl(2-hydroxyethyl)amino]phenyl]azo]-6-methoxy-3- methylbenzothiazolium acetate( CAS No. 84051-87-6)at 20°C and 40°C was 24.5209 mPa.S and 21.4925 mPa.S, respectively.

Key value for chemical safety assessment

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

Additional information

The viscosity determination of Test item 2 -[[4 -[ethyl(2 -hydroxyethyl)amino]phenyl]azo]-6 -methoxy-3 -methylbenzothiazolium acetate (CAS No. 84051 -87 -6 )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 was19.8792 mm²/sec and 17.4240 mm²/s, respectively. Dynamic viscosity (calculated) of Test item at 20°C and 40°C was 24.5209 mPa.S and 21.4925 mPa.S, respectively.