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Physical & Chemical properties

Surface tension

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Reference
Endpoint:
surface tension
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
EU Method A.5 (Surface Tension)
Qualifier:
according to guideline
Guideline:
OECD Guideline 115 (Surface Tension of Aqueous Solutions)
GLP compliance:
yes (incl. QA statement)
Type of method:
plate method
Surface tension:
62.7 mN/m
Temp.:
20 °C
Conc.:
1 g/L

For verification of the measured values the surface tension of demineralized water was also measured. With a correspondence of the measured value σ (20 °C) = 72.5 mN/m, to the theoretical value σ (20 °C) = 72.75 mN/m, cited in literature, the determination of the surface tension of the test item is considered as valid.

Conclusions:
For the test item a surface tension of 62.7 mN/m was determined at 20 °C.
Executive summary:

To determine the surface tension of the test item a plate tensiometer was used which conforms with the procedure test method A.5, described in the EC Guideline.

A commercially available tensiometer based on the plate method has been used to measure the force which is required to withdraw a horizontally suspended plate from the surface of the test solution. The surface tension was determined in a solution of 1.0012 g test item in 1 L demineralized water (= approx. 1 g/L) at 20 °C.

For the test item a surface tension of 62.7 mN/m was determined at 20 °C.

Description of key information

For the test item a surface tension of 62.7 mN/m was determined at 20 °C.

Key value for chemical safety assessment

Surface tension:
62.7
in mN/m at 20°C and concentration in mg/L:
1 001.2

Additional information

To determine the surface tension of the test item a plate tensiometer was used which conforms with the procedure test method A.5, described in the EC Guideline.

A commercially available tensiometer based on the plate method has been used to measure the force which is required to withdraw a horizontally suspended plate from the surface of the test solution. The surface tension was determined in a solution of 1.0012 g test item in 1 L demineralized water (= approx. 1 g/L) at 20 °C.

For the test item a surface tension of 62.7 mN/m was determined at 20 °C.