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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:
August from 02 to 03, 2017
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
test procedure in accordance with generally accepted scientific standards and described in sufficient detail
Qualifier:
according to guideline
Guideline:
OECD Guideline 115 (Surface Tension of Aqueous Solutions)
Version / remarks:
adopted 27th July 1995
GLP compliance:
yes (incl. QA statement)
Type of method:
ring method
Surface tension:
32 mN/m
Temp.:
20 °C
Conc.:
1 g/L

The test item solution was held at constant temperature (20.0 ± 0.5 °C) in a temperature controlled room. The surface tension of test item aqueous solution (ca. 200 mg / 200 ml) was found to be 32.5 (203 sec*), 33.1 (266 sec*), 29.7 (162 sec*), 30.7 (179 sec*), 33.0 (204 sec*) and 32.6 mN/m (212 sec*) (resulting a mean value 32 mN/m) at 20 °C using the ring method.

As this value is lower than 60 mN/m, the substance is classified as surface active.

* Time expired since the test item solution was transferred into the test vessel

Conclusions:
32 mN/m at 20 °C, 1 g/l
Executive summary:

Surface tension of this solution was determined applying the ring method. The test was performed with the help of Krüss Easy Dyne type tensiometer, according to the OECD guideline 115. In the course of the study aqueous solution was prepared containing 1 g/l concentration of test item.

The surface tension of the substance (ca. 200 mg / 200 ml) was found to be 32.5, 33.1, 29.7, 30.7, 33.0 and 32.6 mN/m (resulting a mean value 32 mN/m) at 20 °C using the ring method.

As this value is lower than 60 mN/m, the substance can be considered as surface active.

Conclusion

32 mN/m at 20 °C, 1 g/l

Description of key information

32 mN/m at 20 °C, 1 g/l

Key value for chemical safety assessment

Surface tension:
32
in mN/m at 20°C and concentration in mg/L:
1 000

Additional information

OECD 115 - ring method