L-Glutamic acid, N-coco acyl derivs., monosodium salts

Viscosity

Link to relevant study record(s)

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 OECD test guideline

Qualifier:

according to guideline

Guideline:

OECD Test Guideline 114 (Viscosity of Liquids)

GLP compliance:

no

Type of method:

other: Redwood Viscometer

Key result

Temp.:

20°C

Parameter:

kinematic viscosity (in mm²/s)

Value:

17.318

Key result

Temp.:

40°C

Parameter:

kinematic viscosity (in mm²/s)

Value:

10.903

Key result

Temp.:

20°C

Parameter:

dynamic viscosity (in mPa s)

Value:

16.288

Key result

Temp.:

40°C

Parameter:

dynamic viscosity (in mPa s)

Value:

10.254

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	20°C and 40°C
Observations	Time taken to fill 50ml flask at 20°C in ‘Sec’ (Mean Value)	65.6 sec
	Time taken to fill 50ml at 40°C flask in ‘Sec’ (Mean Value)	41.3 sec
	Density of fluid in gm/cc	0.9405 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

= 65.6 × 0.264sec

= 17.3184 mm²/sec

For Test Temperature at 40°C

ν=ct

= 41.3 × 0.264 sec

= 10.9032 mm²/sec

 

2.Calculation of Dynamic Viscosities:

For Test Temperature at 20°C

ν= η/ρ

17.3184 =η 0.9405

η = 17.3184 x 0.9405

= 16.2879 mPa.S

For Test Temperature at 40°C

ν= η/ρ

10.9032 =η/ 0.9405

η = 10.9032 x 0.9405

= 10.2544 mPa.S

Table: Result

Sr. no.	Temperature of Test item (°C)	Time taken to fill 50ml flask at 20°C in ‘Sec’ (Mean Value)	Kinematic Viscosity in mm²/sec	Density in gm/cc	Dynamic (or) Absolute Viscosity mPa.S
1	20°C	65.6	17.3184	0.9405	16.2879
2	40°C	41.3	10.9032	0.9405	10.2544

 

Conclusions:

Kinematic viscosity (experimental) of test chemical at 20°C and 40°C was determined to be 17.3184 mm²/sec & 10.9032 mm²/s and Dynamic viscosity of the test chemical was calculated to be 16.2879 mPa.S & 10.2544 mPa.S at 20°C and 40°C, respectively.

Executive summary:

The viscosity determination of test chemical was done as per the test guideline OECD 114 using Redwood Viscometer. Kinematic viscosity (experimental) of test chemical at 20°C and 40°C was determined to be 17.3184 mm²/sec & 10.9032 mm²/s and Dynamic viscosity of the test chemical was calculated to be 16.2879 mPa.S & 10.2544 mPa.S at 20°C and 40°C, respectively.

Description of key information

Based on the data from study report, the viscosity determination of test chemical was done as per the test guideline OECD 114 using Redwood Viscometer. Kinematic viscosity (experimental) of test chemical at 20°C and 40°C was determined to be 17.3184 mm²/sec & 10.9032 mm²/s and Dynamic viscosity of the test chemical was calculated to be 16.2879 mPa.S & 10.2544 mPa.S at 20°C and 40°C, respectively.

Key value for chemical safety assessment

Viscosity:

17.318 mm²/s (static)

at the temperature of:

20 °C

Additional information

Based on the data from study report, the viscosity determination of test chemical was done as per the test guideline OECD 114 using Redwood Viscometer. Kinematic viscosity (experimental) of test chemical at 20°C and 40°C was determined to be 17.3184 mm²/sec & 10.9032 mm²/s and Dynamic viscosity of the test chemical was calculated to be 16.2879 mPa.S & 10.2544 mPa.S at 20°C and 40°C, respectively.