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Physical & Chemical properties

Viscosity

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Administrative data

Link to relevant study record(s)

Reference
Endpoint:
viscosity
Type of information:
experimental study
Adequacy of study:
key study
Study period:
30-08-2017 – 30-08-2017
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Justification for type of information:
Experimental test result performed using standard OECD 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 item N-(2-ethylhexyl)-1-[[2-methyl-4-[(4-methylphenyl)azo]phenyl]azo]naphthalen-2-amine (CAS No. 93964-07-9) was done as per the test guideline OECD 114 using Redwood Viscometer No. 1.
GLP compliance:
not specified
Type of method:
other: Redwood Viscometer No. 1.
Specific details on test material used for the study:
- Name of the test material: N-(2-ethylhexyl)-1-[[2-methyl-4-[(4-methylphenyl)azo]phenyl]azo]naphthalen-2-amine
- Regulatory name: N-(2-ethylhexyl)-1-[[2-methyl-4-[(4-methylphenyl)azo]phenyl]azo]naphthalen-2-amine
- Molecular formula: C32H37N5
- Molecular weight: 491.6793 g/mol
- Substance type: Organic
- Smiles: CCCCC(CC)CNc1ccc2ccccc2c1/N=N/c3ccc(cc3C)/N=N/c4ccc(cc4)C
Key result
Temp.:
other: 30°C
Parameter:
kinematic viscosity (in mm²/s)
Value:
52.117
Remarks on result:
other: no other details mentioned
Key result
Temp.:
other: 50°C
Parameter:
kinematic viscosity (in mm²/s)
Value:
49.153
Remarks on result:
other: no other details mentioned
Key result
Temp.:
other: 30°C
Parameter:
dynamic viscosity (in mPa s)
Value:
57.214
Remarks on result:
other: no other details mentioned
Key result
Temp.:
other: 50°C
Parameter:
dynamic viscosity (in mPa s)
Value:
53.96
Remarks on result:
other: no other details mentioned

TEST DESCRIPTION AND RESULT

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

30°C and 50°C

 

Observations

Time taken to fill 50ml flask at 30°C in ‘Sec’ (Mean Value)

211 sec

Time taken to fill 50ml at 50°C flask in ‘Sec’ (Mean Value)

199 sec

Density of fluid in gm/cc

1.0978 gm/cc

 

 

CALCULATIONS:

 

ν=ct-----------------------------------------(i)

Where, ν= Kinematic viscosity c= Viscometer constant

t= timeofflowin seconds(Redwoodsecond) ForRedwoodViscometer- I, thevaluesforthe constantsare asbelow:

 

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. Viscosities:

 

For Test Temperature at 30°C ν=ct

= 211 × 0.247sec

 

=  52.1170mm²/sec

 

For Test Temperature at 50°C ν=ct

= 199 × 0.247sec

 

=  49.1530 mm²/sec

1. Viscosities:

 

For Test Temperature at 30°C ν= η/ρ

52.1170 =η 1.0978

 

η = 52.1170 x 1.0978

 

= 57.2140 mPa.S

 

For Test Temperature at 50°C ν= η/ρ

49.1530 =η/ 1.0978

 

η = 49.1530 x 1.0978

 

= 53.9601 mPa.S

 

RESULT:

Sr.

No.

Temperature of Test item (°C)

Time taken to fill 50ml flask at 30°C in ‘Sec’ (Mean Value)

Kinematic

Viscosity in mm²/sec

Density in gm/cc

Dynamic (or) Absolute Viscosity mPa.S

1.

30°C

211

52.1170

1.0978

57.2140

2.

50°C

199

49.1530

1.0978

53.9601

Conclusions:
Kinematic viscosity (experimental) of N-(2-ethylhexyl)-1-[[2-methyl-4-[(4-methylphenyl)azo]phenyl]azo]naphthalen-2-amine( CAS No. 93964-07-9) at 30°C and 50°C is 52.1170mm²/sec and 49.1530 mm²/s, respectively.
Dynamic viscosity (calculated) of N-(2-ethylhexyl)-1-[[2-methyl-4-[(4-methylphenyl)azo]phenyl]azo]naphthalen-2-amine( CAS No. 93964-07-9)at 30°C and 50°C is 57.2140 mPa.S and 53.9601 mPa.S, respectively.
Executive summary:

The viscosity determination of Test item N-(2-ethylhexyl)-1-[[2-methyl-4-[(4-methylphenyl)azo]phenyl]azo]naphthalen-2-amine (CAS No. 93964-07-9 )was done as per the test guideline OECD 114 using Redwood Viscometer No. 1. Kinematic viscosity (experimental) of Test item at 30°C and 50°C is 52.1170 mm²/sec and 49.1530 mm²/s, respectively. Dynamic viscosity (calculated) of Test item at 30°C and 50°C was 57.2140 mPa.S and 53.9601 mPa.S, respectively.

Description of key information

Kinematic viscosity (experimental) of N-(2-ethylhexyl)-1-[[2-methyl-4-[(4-methylphenyl)azo]phenyl]azo]naphthalen-2-amine( CAS No. 93964-07-9) at 30°C and 50°C is 52.1170mm²/sec and 49.1530 mm²/s, respectively.

Dynamic viscosity (calculated) of N-(2-ethylhexyl)-1-[[2-methyl-4-[(4-methylphenyl)azo]phenyl]azo]naphthalen-2-amine( CAS No. 93964-07-9)at 30°C and 50°C is 57.2140 mPa.S and 53.9601 mPa.S, respectively.

Key value for chemical safety assessment

Viscosity:
52.117 mm²/s (static)
at the temperature of:
30 °C

Additional information

The viscosity determination of Test item N-(2-ethylhexyl)-1-[[2-methyl-4-[(4-methylphenyl)azo]phenyl]azo]naphthalen-2-amine (CAS No. 93964-07-9 )was done as per the test guideline OECD 114 using Redwood Viscometer No. 1. Kinematic viscosity (experimental) of Test item at 30°C and 50°C is 52.1170 mm²/sec and 49.1530 mm²/s, respectively. Dynamic viscosity (calculated) of Test item at 30°C and 50°C was 57.2140 mPa.S and 53.9601 mPa.S, respectively.