2-Propenoic acid, 2-[[1,1,2-trifluoro-2-(1,1,2,2,3,3,3-heptafluoropropoxy)ethyl]thio]ethyl ester

Surface tension

Link to relevant study record(s)

Reference

Endpoint:

surface tension

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2019-10-09 to 2019-10-10

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

EU Method A.5 (Surface Tension)

Deviations:

no

Qualifier:

according to guideline

Guideline:

OECD Guideline 115 (Surface Tension of Aqueous Solutions)

Deviations:

no

GLP compliance:

no

Type of method:

ring method

Key result

Surface tension:

65.3 mN/m

Temp.:

20 °C

Conc.:

1 g/L

Table 1: Surface tension

Measurement	1	2	3	4	5	6
Time (s)	871	993	1114	1235	1357	1478
σ (mN/m) uncorrected	70.95	70.86	70.83	70.74	70.78	70.65
σ (mN/m) corrected according to Zuidema and Waters^1	65.43	65.35	65.33	65.23	65.27	65.14

Mean value: σ = 65.3 mN/m (corrected according to Zuidema and Waters¹)

The aqueous solution of the test item had a mean surface tension of 65.3 mN/m. As the surface tension was higher than 60 mN/m, the test item had no surface-active properties.

 

¹ Zuidema, H., Waters, C.W., Ind. Eng. Chem. Analyt. 13 (1941), S. 312

Conclusions:

The surface tension of the aqueous solution of the test item at 20 °C had a mean value of 65.3 mN/m. The test item had no surface-active properties.

Executive summary:

A study was conducted according to OECD TG 115 and Regulation (EC) No 440/2005 Method A.5. to determine the surface tension of an aqueous solution of the test item using the ring method. 250.6 mg of the test item were filled up to 250 ml with demineralized water and stirred at ambient temperature for 21 h. The test item was not completely dissolved after the stirring period. For this reason the solution was centrifuged (30 min, 15000rpm). An aliquot of the aqueous phase was taken and diluted to 90 %. After adapting to 20 °C the measurement of the surface tension with the test item was carried out at 20 ± 0.5 °C (20.3 °C). The measurements were repeated until 6 measurements were within the limits of the stability criterion. The aqueous solution of the test item had a mean surface tension of 65.3 mN/m. As the surface tension was higher than 60 mN/m, the test item had no surface-active properties.

Description of key information

The surface tension of the aqueous solution of the test item at 20 °C had a mean value of 65.3 mN/m. The test item had no surface-active properties (reference 4.10-1).

Key value for chemical safety assessment

Surface tension:

65.3

in mN/m at 20°C and concentration in mg/L:

1

Additional information

A study was conducted according to OECD TG 115 and Regulation (EC) No 440/2005 Method A.5. to determine the surface tension of an aqueous solution of the test item using the ring method. 250.6 mg of the test item were filled up to 250 ml with demineralized water and stirred at ambient temperature for 21 h. The test item was not completely dissolved after the stirring period. For this reason the solution was centrifuged (30 min, 15000rpm). An aliquot of the aqueous phase was taken and diluted to 90 %. After adapting to 20 °C the measurement of the surface tension with the test item was carried out at 20 ± 0.5 °C (20.3 °C). The measurements were repeated until 6 measurements were within the limits of the stability criterion. The aqueous solution of the test item had a mean surface tension of 65.3 mN/m. As the surface tension was higher than 60 mN/m, the test item had no surface-active properties.