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Surface tension

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surface tension
Type of information:
experimental study
Adequacy of study:
key study
Study period:
19 Feb 2015 to 12 Mar 2015
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
according to guideline
OECD Guideline 115 (Surface Tension of Aqueous Solutions)
Version / remarks:
GLP compliance:
Type of method:
ring method
Key result
Surface tension:
71.4 mN/m
20 °C
Remarks on result:
other: 90% saturated solutions of the test item in water

Surface tension = reading x calibration factor
Sample Solution A = 71.1 x 0.997

Sample Solution A = 70.9 mN/m
Sample Solution B = 72.2 x 0.996

Sample Solution B = 71.9 mN/m

Overall mean  = 71.4 mN/m
Temperature = 20.0 ± 0.5 ºC
pH of sample solution: Sample Solution A = 5.4, Sample Solution B = 5.4

On completion of the[SdG1] static equilibration period at 20 °C, both aqueous samples contained undissolved, excess test item; indicating that saturation had been achieved. Following centrifugation and filtration, the isolated supernatants were clear, colorless solutions and visually confirmed to be free from any excess, undissolved test item prior to diluting to 90% saturation.

The average surface tension of duplicate 90% saturated solutions of test item in water has been determined to be 71.4 mN/m at 20.0 ± 0.5 °C.
Executive summary:

The surface tension of the test item has been determined using the ring method in accordance with OECD TG 115 and in compliance with GLP. The surface tension of two samples of the test item in water has been determined to be 71.4 mN/m at 20.0 °C.

Description of key information

71.4 mN/m at 20 °C, OECD 115, ring method, O 'Connor 2015.

Key value for chemical safety assessment

Surface tension:

Additional information