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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:
30-04-2012
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
EU Method A.5 (Surface Tension)
Deviations:
no
GLP compliance:
yes (incl. certificate)
Type of method:
ring method
Specific details on test material used for the study:
- Name of test material (as cited in study report): Jeffcat ZR50
- Physical state: Liquid
- Batch: PFW100207
- Composition of test material, percentage of components: contains 0.03% water
- Storage conditions: in cool, well-ventilated area
Surface tension:
65.3 mN/m
Temp.:
20 °C
Conc.:
1 g/L
Remarks on result:
other: The surface tension result is corrected for water calibration as well as for measurement ring parameters (Harkins-Jordan). Solution age was 10 minutes for test No 1 and 15 minutes for test No 2.

Calibration:

The measured value of the surface tension of water: 67.5 mN/m.

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

Calibration factor is: 72.75/67.5 = 1.078

The calibration factor is determined by measuring the Surface Tension of water and comparing the value obtained in literature.

The corrected value for measurement ring parameters is taken from a table compiled on the basis of the Harkins-Jordan correction.

The duplicate runs provided following values: 65.8 mN/m for run 1 and 64.7 mN/m for run 2.

Conclusions:
The surface tension of the substance was determined to be 65.3 mN/m at a test concentration of 1 g/L and at 20°C. The substance is concluded not to have surface active properties.

Description of key information

The surface tension of the test substance was determined in a GLP-compliant study according to test method EC A.5, to be 65.3 mN/m at a test concentration of 1 g/L and at 20°C, following the ring method (Younis S, 2012).

Key value for chemical safety assessment

Surface tension:
65.3
in mN/m at 20°C and concentration in mg/L:
1 000

Additional information

The substance is concluded not to have surface active properties.