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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:
2020-04-27
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
OECD Guideline 115 (Surface Tension of Aqueous Solutions)
Version / remarks:
1995
Deviations:
no
Qualifier:
according to guideline
Guideline:
EU Method A.5 (Surface Tension)
Version / remarks:
2008
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Type of method:
ring method
Key result
Surface tension:
67.4 mN/m
Temp.:
20 °C
Conc.:
1.061 g/L

Value No.

1stMeasurement

(5 min after preparing the solution)

σ [mN/m]

2ndMeasurement

(27 min after preparing the solution)

σ [mN/m]

1

67.03

67.69

2

67.01

67.69

3

67.00

67.69

4

66.99

67.69

5

66.99

67.69

6

66.98

67.70

Mean value of the

individual values

67.00 ± 0.02

67.69 ± < 0.01

Total mean value

67.35 ± 0.35

The aqueous solution of the test item has a mean surface tension of 67.4 mN/m. According to Regulation (EC) No. 440/2008 Part A. Method A.5 substances showing a surface tension lower than 60 mN/m under the conditions of method A.5 should be regarded as being surface active materials.Thus, the test item is not regarded as surface active material.

Conclusions:
The mean surface tension of the test item is 67.4 mN/m at 20 °C.
Executive summary:

A study was conducted according to EU-Method A.5 and OECD Guideline 115 to determine the surface tension of an aqueous solution of the test item using the ring method. Due to the high water solubility a solution with a concentration of 1.061 g/L was prepared and measured twice. The mean surface tension of the test item was determined to be 67.4 mN/m at 20 °C.

Description of key information

The mean surface tension of the test item is 67.4 mN/m at 20 °C.

Key value for chemical safety assessment

Surface tension:
67.4
in mN/m at 20°C and concentration in mg/L:
1 061

Additional information

A study was conducted according to EU-Method A.5 and OECD Guideline 115 to determine the surface tension of an aqueous solution of the test item using the ring method. Due to the high water solubility a solution with a concentration of 1.061 g/L was prepared and measured twice. The mean surface tension of the test item was determined to be 67.4 mN/m at 20 °C.