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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
Study period:
Start date of the experimental work: 1 February 2018 and completion date of the experimental work: 8 May 2018
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
OECD Guideline 115 (Surface Tension of Aqueous Solutions)
Deviations:
no
Qualifier:
according to
Guideline:
EU Method A.5 (Surface Tension)
Deviations:
no
GLP compliance:
yes (incl. certificate)
Type of method:
ring method
Key result
Surface tension:
67.1 mN/m
Temp.:
20 °C
Conc.:
1 g/L

Note

Measured value of the surface tension of water : 70.3 mN.m-1

EC standard reading for surface tension of water : 72.75 mN.m-1

Sample Preparation and Analysis.

The age of the solution and the corresponding surface tension for both runs (after correction for water calibration) is detailed in following Table.

 Solution age (minutes) Surface Tension Reading (mN/m) 
    Run 1
 5  69.0
 20  68.6
 35  68.7
 50  68.5
 90  68.5
    Run 2
 5  65.4
 20  65.6
 35  65.9
 55  65.5
 80  65.6

Results: 67.1 mN.m-1 (mean value)

Conclusions:
The test is conducted to determine the effect of a compound, on the free surface enthalpy per unit surface area of water.
The test is conducted in accordance to EU Regulation (EC) 440/2008, Annex Part A test A5 and OECD Test Guideline 115.
Result : 67.1 mN.m-1 (mean value) at 20°C

Description of key information

Result : 67.1 mN.m-1 (mean value) at 20°C at 1g/L.

Key value for chemical safety assessment

Surface tension:
67.1
in mN/m at 20°C and concentration in mg/L:
1 000

Additional information