2-ethylhexyl (4-chloro-2-methylphenoxy)acetate

Viscosity

Administrative data

Endpoint:

viscosity

Type of information:

experimental study

Adequacy of study:

key study

Study period:

08.01.2018 - 16.01.2018

Reliability:

1 (reliable without restriction)

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2018

Report date:

2018

Materials and methods

Test guideline

Test guideline 1

Qualifier:

according to guideline

Guideline:

CIPAC MT 192 (Viscosity of liquids by rotational viscometry)

Test guideline 2

Qualifier:

according to guideline

Guideline:

ISO 3219 (Plastics; polymers/resins in the liquid state or as emulsions or dispersions; determination of viscosity using a rotational viscometer with defined shear rate)

Test guideline 3

Qualifier:

according to guideline

Guideline:

other: kinematic viscosity calculated from dynamic viscosity and density.

GLP compliance:

yes (incl. QA statement)

Type of method:

rotational viscometer (dynamic)

Test material

Test material information

Constituent 1

Reference substance name:

2-ethylhexyl (4-chloro-2-methylphenoxy)acetate

EC Number:

249-636-2

EC Name:

2-ethylhexyl (4-chloro-2-methylphenoxy)acetate

Cas Number:

29450-45-1

Molecular formula:

C17H25ClO3

IUPAC Name:

2-ethylhexyl (4-chloro-2-methylphenoxy)acetate

impurity 1

Reference substance name:

Water

EC Number:

231-791-2

EC Name:

Water

Cas Number:

7732-18-5

Molecular formula:

H2O

IUPAC Name:

water

impurity 2

Reference substance name:

(4-chloro-2-methylphenoxy)acetic acid

EC Number:

202-360-6

EC Name:

(4-chloro-2-methylphenoxy)acetic acid

Cas Number:

94-74-6

Molecular formula:

C9H9ClO3

IUPAC Name:

(4-chloro-2-methylphenoxy)acetic acid

Test material form:

liquid

Results and discussion

Viscosity

Viscosity 1

Key result

Temp.:

20°C

Parameter:

dynamic viscosity (in mPa s)

Value:

ca. 31.2

Viscosity 2

Key result

Temp.:

40°C

Parameter:

dynamic viscosity (in mPa s)

Value:

ca. 11.57

Any other information on results incl. tables

1.      Dynamic viscosity determination at 20^oC and 40^oC:

Determination of viscosity was carried out in accordance with  PN-EN ISO 3219:2000.

The sample is transferred to a standard measuring system. The measurement is carried out under different share conditions and the apparent viscosities are determined. During the test the temperature of tested sample is kept constant.

The measurement were carried out at 20^oC and 40^oC. Viscometer calibration was done before test at the same temperatures. In measurements CS4-18 spindle at 50 and 100 RPM was used.

Share rate [sec^-1] was calculated by the following formula:

Share rate [sec^-1] = 1.32*N

1.32 – SC4-18 cylindrical spindle factor (from Supplier`s manual)

N – speed [RPM]

Thus calibration measurement was done at following share rate: 66 sec^-1and 132 sec^-1.

The sample chamber was fitted into a water jacket connected to an external thermostat which was set at selected temperature for the test.

An aliquot of 7 to 9 ml of test item was placed into the sample chamber and after about 15 minutes the thermal equilibrium was verified. The spindle was vertically immersed into the test item starting to rotate with the selected speed. After a few seconds, when the measurement became stable, the viscosity value expressed in mPa*s was displayed on the screen viscometer. The measurement at each speed was performed in triplicate.

Results:

Table 1. results for calibration of rotational viscometer using reference standard N10

Test temperature [^oC]	Spindle speed [RPM]	Share rate [s^-1]	MCPA-2EH Dynamic viscosity, [mPa*s]
			Test result	Average	SD
20	50	66	17.92 17.92 17.92	17.9	0.00
	100	132	17.92 17.92 17.28	17.7	0.40
40	50	66	8.96 9.60 8.96	9.17	0.37
	100	132	8.64 8.32 8.32	8.43	0.18

 

Table 2. Results of dynamic viscosity measurement for MCPA-2EH

Test temperature [^oC]	Spindle speed [RPM]	Share rate [s^-1]	MCPA-2EH Dynamic viscosity, [mPa*s]
			Test result	Average	SD
20	50	66	31.36 31.36 31.36	31.36	0.00
	100	132	31.04 30.72 31.36	31.04	0.32
40	50	66	11.52 12.16 12.16	11.95	0.37
	100	132	11.20 10.88 11.52	11.20	0.32

 

Conclusions on results:

Dynamic viscosity of MCPA-2EH at 20^oC is 31.20 mPa*s (average of results at share rate 66 s^-1and 132 s^-1).

Dynamic viscosity of MCPA-2EH at 40^oC is 11.58 mPa*s (average of results at share rate 66 s^-1and 132 s^-1).

 

2.      Kinematic viscosity determination at 40^oC:

Kinematic viscosity was determined on the calculation method using following formula:

V = ŋ/ƿ

V – kinematic viscosity in mm²/s

ŋ – dynamic viscosity in mPa*s

ƿ – density in g/cm³

Density at 40^oC was determined according to PN-EN ISO 3675:2004 Standard giving following results:

Table 3. Results of density measurement for MCPA-2EH

Test temperature	Density, g/cm^3			Average	SD
40^oC	Test 1	Test 2	Test 3	1.051	0.000
	1.051	1.051	1.051

 

Density of MCPA-2EH at 40^oC is1.051 g/cm³.

Kinematic viscosity calculation at 40^oC:

V = ŋ/ƿ = 11.58 mPa*s / 1.051 g/cm3 =11.018 mm²/s

Applicant's summary and conclusion

Executive summary:

The dynamic viscosity of MCPA-2EH was determined to be 31.20 mPa*s at 20 °C and 11.58 mPa*s at 40 °C, respectively. The kinematic viscosity at 40^oC was calculated to be 11.018 mm²/s.