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Diss Factsheets

Physical & Chemical properties

Surface tension

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surface tension
Type of information:
experimental study
Adequacy of study:
key study
Study period:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
according to guideline
OECD Guideline 115 (Surface Tension of Aqueous Solutions)
GLP compliance:
not specified
Type of method:
OECD harmonised ring method
Key result
Surface tension:
44.3 mN/m
23 °C
40 mg/L
Remarks on result:
other: Method used- du Noüy ring
The surface tension of an aqueous solution of test substance (40 mg/L) was 44.3 mN/m at 23°C.
Executive summary:
A study was conducted to determine the surface tension of the test substance according to OECD Guideline 115, using the K11 MK4 tensiometer of Krüss and the du Noüy ring method at 23°C. A saturate solution was prepared in deionized water. A platinum-iridium (PtIr) ring with a diameter (=2R) of ca. 2 cm was then dipped into the vessel containing the aqueous solution. The surface tension was calculated according toϒ=Ff/4πR, where F is the maximum equilibrium force and f is a correction factor which accounts for the volume of the raised liquid, the ring and the wire radii. Under the study conditions, the surface tension of aqueous solution of test substance (40 mg/L) was 44.3 mN/m at 23°C (Boutreau, 2014).

Description of key information

The surface tension of an aqueous solution of test substance was determined according to OECD Guideline 115 (Boutreau, 2014).

Key value for chemical safety assessment

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

Additional information