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Physical & Chemical properties

Surface tension

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Reference
Endpoint:
surface tension
Type of information:
experimental study
Adequacy of study:
key study
Study period:
27.10.2016 - 13.12.2016
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:
70.6 mN/m
Temp.:
20 °C
Conc.:
1 g/L

Table 1: Surface tension

Measurement

1

2

3

4

5

6

Time (s)

30

90

151

213

275

337

σ (mN/m) uncorrected

76.14

76.15

76.15

76.15

76.15

76.15

σ (mN/m) corrected according to Zuidema and Waters*

70.63

70.64

70.64

70.64

70.64

70.64

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

Mean value: σ = 70.6 mN/m (corrected according to Zuidema and Waters*)

The aqueous solution of the test item had a mean surface tension of 70.6 mN/m. As the surface tension was higher than 60 mN/m, the test item had no surface-active properties.

Conclusions:
The surface tension of the aqueous solution of the test item at 20 °C had a mean value of 70.6 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. Therefore, a saturated solution of the test substance in de-ionized water was prepared in by adding 200 mg of the test substance to 200 mL of de-ionized water and thoroughly mixed at a constant temperature (20 °C) for 21 h. After adapting at 20 °C the surface tension measurements were performed at 20.0 ± 0.5 °C. The surface tension of the test item aqueous solution was found to be 70.6 mN/m. As this value is 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 70.6 mN/m. The test item had no surface-active properties.

Key value for chemical safety assessment

Surface tension:
70.6
in mN/m at 20°C and concentration in mg/L:
1 000

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. Therefore, a saturated solution of the test substance in de-ionized water was prepared in by adding 200 mg of the test substance to 200 mL of de-ionized water and thoroughly mixed at a constant temperature (20 °C) for 21 h. After adapting at 20 °C the surface tension measurements were performed at 20.0 ± 0.5 °C. The surface tension of the test item aqueous solution was found to be 70.6 mN/m. As this value is higher than 60 mN/m, the test item had no surface-active properties (reference 4.10-1).