Registration Dossier
Registration Dossier
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EC number: 434-440-3 | CAS number: -
Surface tension
Administrative data
Link to relevant study record(s)
- Endpoint:
- surface tension
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 17 March to 15 May 1998
- 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
- Type of method:
- ring method
- Key result
- Surface tension:
- 49 mN/m
- Temp.:
- 22 °C
- Conc.:
- 447.3 mg/L
Reference
Results
The temperature during the test was measured to be 22 °C. The literature value for the surface tension of water at 22°C is 72.4 mN/m. The measured surface tension of water at test conditions was 72.0 mN/m; a calibration factor of 1.006 was obtained.
The following table reports the results of the surface tension determination for the test substance.
Time [min] |
Surface tension [mN/m] |
|||
Measured |
Calibration corrected |
|||
A |
B |
A |
B |
|
0 |
51.0 |
50.5 |
51.5 |
51.0 |
10 |
51.0 |
50.5 |
51.5 |
51.0 |
20 |
51.0 |
50.5 |
51.5 |
51.0 |
30 |
51.5 |
51.0 |
52.0 |
51.5 |
From the results there was no apparent time dependence of surface tension after transfer to the measuring vessel.
Overall mean calibration corrected surface tension was 51.5 mN/m, the Harkins-Jordan corrected value was 49.0 mN/m
Conclusion
The surface tension of a 90% saturated solution of the test substance was found to be 49.0 mN/m. As the result is lower than 60 mN/m, the test substance is considered to be surface active.
Description of key information
Surface tension: 49.0 mN/m at 22 °C and 447.3 mg/L (EU Method A.5, ring method)
Key value for chemical safety assessment
Additional information
As the surface tension is lower than 60 mN/m, the test substance is considered to be surface active.
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