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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:
January 24, 2012 - March 19, 2012
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: This study has been performed in accordance with OECD 115 (1995), EU Method A.5 (2008) and according to GLP principles.
Qualifier:
according to
Guideline:
OECD Guideline 115 (Surface Tension of Aqueous Solutions)
Version / remarks:
(1995)
Deviations:
no
Qualifier:
according to
Guideline:
EU Method A.5 (Surface Tension)
Version / remarks:
(2008)
Deviations:
no
GLP compliance:
yes
Type of method:
OECD harmonised ring method
Key result
Surface tension:
35.4 mN/m
Temp.:
20 °C
Remarks on result:
other: The test substance is considered to be surface active.

Calibration

The mean calculated from measurements 2 to 6, after equilibrium was reached, was 71.3 mN/m. The calibration factor was therefore calculated to be 1.02.

Determination of the surface tension of the test solution

Measurement

Time passed

[minutes]

Surface tension [mN/m]

individual

mean

mean multiplied by Φb and Harkins-Jordan

corrected value

1

20

35.6

36.6 *

35.4

2

21

35.2

3

22

35.4

4

23

36.5

5

24

36.8

6

25

36.4

7

26

36.4

8

27

36.7

 

Conclusions:
The OECD harmonized ring method was applied for the determination of the surface tension of the substance in accordance with OECD 115 (1995), EU Method A.5 (2008) and according to GLP principles. The surface tension of a test solution at a concentration of 1 g solids/l at 20°C was 35.4 mN/m. Therefore the substance is considered to be surface active.

Description of key information

The surface tension of a test solution at a concentration of 1 g solids/L at 20°C was 35.4 mN/m. Therefore the substance is considered to be surface active.

Key value for chemical safety assessment

Surface tension:
35.4
in mN/m at 20°C and concentration in mg/L:
1 000

Additional information

The OECD harmonized ring method was applied for the determination of the surface tension of the substance in accordance with OECD 115 (1995), EU Method A.5 (2008) and according to GLP principles.