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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:
2012-04-03 till 2012-10-02
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Reason / purpose for cross-reference:
reference to same study
Qualifier:
according to guideline
Guideline:
other: DIN EN 14370
Deviations:
no
Qualifier:
according to guideline
Guideline:
OECD Guideline 115 (Surface Tension of Aqueous Solutions)
Version / remarks:
(adopted, 27th July 1995)
Deviations:
no
Qualifier:
according to guideline
Guideline:
EU Method A.5 (Surface Tension)
Version / remarks:
(adopted, May 2008)
Deviations:
no
Principles of method if other than guideline:
Surface tension at 20°C:
The surface tension is determined using a plate tensiometer. A commercially available tensiometer based on the plate methode is used to measure the force which is required to withdraw a horizontally suspended plate from the surface of the test material or its solution in water.
GLP compliance:
yes (incl. QA statement)
Type of method:
plate method
Surface tension:
67 mN/m
Temp.:
20 °C
Conc.:
1 g/L

 Determination  Time

 Surface tension at 20 °C of

the test item diluted in water

concentration = 1 g/L

   [min]  [mN/m]
 1  10  71.4
 2  34  70.7
 3  56  70.0
 4  75  69.5
 5  106  68.3
 6  146  66.6
 7  177  66.0
 8  210  67.0
 Mean value    67.0
 
Conclusions:
The surface tension of the test item was measured σ = 67.0 mN/m at 20 °C and a concentration of 1 g/L.
Executive summary:

Surface tension of the test item was determined according DIN EN 14370 (OECD 115 and method A.5) and was measured by the plate method using a tensiometer at σ = 67.0 mN/m at 20 °C and a concentration of 1 g/L.

Description of key information

According to EU method A.5, the surface tension of the test item was measured σ = 67.0 mN/m at 20 °C and a concentration of 1 g/L.

Key value for chemical safety assessment

Surface tension:
67
in mN/m at 20°C and concentration in mg/L:
1 000

Additional information