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

Surface tension

Administrative data

Endpoint:

surface tension

Type of information:

experimental study

Adequacy of study:

key study

Study period:

24.07.2007

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2007

Report date:

2007

Materials and methods

Test guideline

Qualifier:

according to guideline

Guideline:

EU Method A.5 (Surface Tension)

Version / remarks:

1.6.4. OECD harmonized ring method

GLP compliance:

yes (incl. QA statement)

Type of method:

OECD harmonised ring method

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:

(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

Surface tension

Key result

Surface tension:

71.6 mN/m

Temp.:

20 °C

Conc.:

90 other: % w/w

Any other information on results incl. tables

The measured surface tension of pure water at 20°C was determined to be 71.5 mN/m. The literature at this temperature is 72.75 mN/m, and therefore the calibration factor was determined to be 1.02.

Table: Measurement of surface tension of MCPA-2EH water solution (concentration of test item is 90% of the saturation solubility) at 20^oC:

Measurement no.	1	2	3	4
Time of test item transfer to measurement vessel, minutes	10	15	20	60
Test item surface tension, mN/m	70.0	70.2	70.2	70.2

The average value of surface tension is 70.2 ± 0.1 mN/m

After application of the calibration factor, the mean result was71.6 mN/m at 20^oC.

Applicant's summary and conclusion

Conclusions:

The surface tension at 20 °C of MCPA-2EH was determined to be 71.6 mN/m at 90% aqueous saturation.

Executive summary:

A study was conducted according to EEC A.5: 1.6.4. OECD harmonized ring method, to determine the surface tension of the aqueous solution of the test item. Therefore, a saturated solution of the test substance in distilled water was prepared at 90% aqueous saturation. The solution was measured at the test temperature (20°C). The surface tension of MCPA-2EH was determined to be 71.6 mN/m at 90% aqueous saturation at 20 °C.