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EC number: 807-754-7
CAS number: 89929-57-7
4.10/2: Surface tension of the test substance
Time passed after transfer test solution to test vessel [minutes]
Surface tension [mN/m]
mean multiplied by Φb and Harkins-Jordan corrected value
surface tension of the test substance was measured under GLP according
to OECD 115/EU A5 guidelines, using
the OECD harmonized ring method.
The apparatus was calibrated with water. Readings
were recorded on a test
solution with concentration expected to be < 90% saturation.
mean of five consistent values was corrected with calibration
and H&J factors.
surface tension of the test solution (< 600 mg/L) at 20 °C was 44.3 mN/m.
Surface tension = 44.3 mN/m (concentration expected < 600 mg/L, and at
According to EU A5 criteria, as the result is below the threshold value
of 60 mN/m, the substance is considered to have surface-active potential
under the experimental conditions. However, since the structure is not
characteristic of a true surfactant, and it is not the intended use of
the substance (i.e. not a desired property), this conclusion should be
taken with caution.
Based on chemical structure, showing no alert, and considering the
substance is not intended to be used as a surfactant, no further data
should be required.
However, an experimental study, conducted according to a recognized
OECD/EC method and under GLP, is available, and provided as supporting
data. The result was found contradictory to the above assessment. Testing
conditions (concentration of solution) did not comply with guideline
requirements, so the result is not retained as key value. However the
information is useful for qualitative assessment.
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