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Surface tension

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surface tension
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2006-06-07 to 2006-09-07
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
according to guideline
EU Method A.5 (Surface Tension)
Version / remarks:
according to guideline
OECD Guideline 115 (Surface Tension of Aqueous Solutions)
Version / remarks:
GLP compliance:
yes (incl. QA statement)
Type of method:
ring method
Key result
Surface tension:
70.8 mN/m
20 °C
1 000 mg/L

Two aqueous solutions of the test item (approx. 1 g / L; 202.3 mg and 203.8 mg ad 200 ml) were prepared by adding distilled water and shaking the solutions. The test item was solved completely.

The measurements were carried out at 20°C ± 0.5°C. A correction factor (Harkins & Jordan) has been accounted for.

The mean value, multiplied by the calibration factor (F= 1.0099) yields to:F = 70.8 mN/m.


Validity criteria for the measurement of the surface tension:

Target condition according to guideline OECD 115:Actual condition according to the study:Validity criteria met:
A solution of the substance is prepared in distilled water. The concentration of this solution should be 90 % of the saturation solubility of the substance in water; when this concentration exceeds 1 g/ L, a concentration of 1 g/ L is used for testing.The test substance was determined to be miscible with water at any ratio (see "Water solubility"). A concentration of 1 g/ L was used for testing. Yes
The measurement shall be made at approximately 20 °C and shall be controlled to within ± 0.5 °C.The test temperature was 20 °C ± 0.5 °C.Yes
The measurement results: individual readings, their arithmetic mean and the corrected mean; concentration of the solution should be stated.The results are stated in sufficient detail (a correction factor (Harkins & Jordan) has already been accounted in the individual results).Yes


The surface tension of the test substance was 70.8 mN/m at 20°C.
Executive summary:

The surface tension of the test substance was 70.8 mN/m at 20°C.

Description of key information

The surface tension of the test substance was 70.8 mN/m at 20°C.

Key value for chemical safety assessment

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

Additional information