Methyl O-(4-amino-3,5-dichloro-6-fluoropyridin-2-yloxy)acetate

Surface tension

Administrative data

Endpoint:

surface tension

Type of information:

experimental study

Adequacy of study:

key study

Study period:

26 April 1991-25 November 1991.

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: GLP guideline study

Cross-reference

Reason / purpose for cross-reference:

reference to same study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

1991

Report date:

1991

Materials and methods

Test guideline

Test guideline 1

Qualifier:

according to guideline

Guideline:

OECD Guideline 115 (Surface Tension of Aqueous Solutions)

Test guideline 2

Qualifier:

according to guideline

Guideline:

EU Method A.5 (Surface Tension)

GLP compliance:

yes

Type of method:

ring method

Test material

Test material information

Constituent 1

Reference substance name:

Methyl O-(4-amino-3,5-dichloro-6-fluoropyridin-2-yloxy)acetate

EC Number:

407-550-4

EC Name:

Methyl O-(4-amino-3,5-dichloro-6-fluoropyridin-2-yloxy)acetate

Cas Number:

69184-17-4

Molecular formula:

Hill formula: C8 H7 Cl2 F N2 O3 CAS formula: C8 H7 Cl2 F N2 O3

IUPAC Name:

methyl 2-[(4-amino-3,5-dichloro-6-fluoropyridin-2-yl)oxy]acetate

Details on test material:

- Name of test material (as cited in study report): Fluroxypyr methyl ester
- Physical state: black crystalline powder
- Analytical purity: 90.8%
- Purity test date: 28.08.1990
- Lot/batch No.: C-3B
- Expiration date of the lot/batch: August 1992
- Storage condition of test material: at room temperature in the dark

Results and discussion

Surface tension

Surface tension 1

Surface tension:

70 mN/m

Temp.:

22 °C

Conc.:

9.32 mg/L

Surface tension 2

Surface tension:

72.2 mN/m

Temp.:

22 °C

Conc.:

4.86 mg/L

Any other information on results incl. tables

Values for surface tension were obtained as soon as possible after transfer of the aqueous solution to the measurement vessel:

Solution conc	Time (min)	Surface tension (mN/m)
		Run A		Run B
		measured	corrected	measured	corrected
9.32 mg/L (3.46E-5 M)	0	70.0	69.8	69.6	69.4
	5	69.8	69.6	69.4	69.2
	10	69.9	69.7	69.8	69.6
	20	70.0	69.8	70.0	69.8
	30	70.0	69.8	70.0	69.8
	40	70.4	70.2	70.1	69.9
	50	70.7	70.5	70.2	70.0
	60	70.7	70.5	70.6	70.4
	70	70.8	70.6	70.6	70.4
	80	70.5	70.3	70.6	70.4
	mean		70.1		69.9
	overall mean = 70.0 ± 0.4
4.86 mg/L (1.81E-5 M)	0	72.6	72.4	72.4	72.2
	5	72.7	72.5	72.4	72.2
	10	72.5	72.3	72.2	72.0
	20	72.5	72.3	72.3	72.1
	30	72.4	72.2	72.4	72.2
	mean		72.3		72.1
	overall mean = 72.2 ± 0.14

From the results there was no apparent time dependence of surface tension after transfer to the measuring vessel. As the surface

tension is very close to that of water, the substance (technical) is considered non surface active.