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Surface tension

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Reference
Endpoint:
surface tension
Type of information:
experimental study
Adequacy of study:
key study
Study period:
11 February 2011 – 27 April 2011
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: This study has been performed according to OECD and EC guidelines and in compliance with GLP principles.
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:
(Official Journal of the European Union no. L142, May 31, 2008)
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Type of method:
OECD harmonised ring method
Surface tension:
73.7 mN/m
Temp.:
20 °C
Conc.:
1 g/L

The calibration factor (Φb) was calculated to be 1.01.

Details on the results of the test on the determination of the surface tension of the test solution are given in the table below:

Measurement

 

Time passed

[minutes]

 

Surface tension

[mN/m]

individual

 

mean

 

mean multiplied by

Φband Harkins-Jordan

corrected value

 

1

2

3

4

5

6

 

 

20

21

22

23

24

25

 

73.6

73.0

72.8

73.1

73.2

73.1

 

73.01

 

 

73.7

 

1 Mean calculated from measurements 2 to 6, after equilibrium was reached.

Conclusions:
The OECD harmonized ring method was applied for the determination of the surface tension of E-C104. The surface tension of a test solution at a concentration of 1 g/l and at 20°C was 73.7 mN/m. As this value is well above the cut-off value for surface active materials (< 60 mN/m), the test substance is considered not to be surface active.

Description of key information

Key value for chemical safety assessment

Surface tension:
7.37
in mN/m at 20°C and concentration in mg/L:
1 000

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