Registration Dossier
Registration Dossier
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EC number: 614-657-1 | CAS number: 68609-08-5
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:
- from 2007-11-23 to 2007-12-10
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Remarks:
- The study was regarded as reliable because it was conducted in compliance with GLP regulation and guidelines.
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.5 (Surface Tension)
- Version / remarks:
- Commission Directive 92/96/EEC, Annex V
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 115 (Surface Tension of Aqueous Solutions)
- Version / remarks:
- 1995-07-27
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- ring method
- Key result
- Surface tension:
- 71 mN/m
- Temp.:
- 20 °C
- Conc.:
- 12.4 mg/L
- Conclusions:
- The surface tension of the test item in an aqueous solution was found to be 71.0 mN/m at 20 °C, using the ring method. As this value is higher than 60 mN/m, the substance is not classified as surface active.
- Executive summary:
The surface tension of the test item in an aqueous solution (12.4 mg/L) was found to be 71.0 mN/m at 20 °C, using the ring method, representing the mean of five separate measurements performed according to OECD 115. As this value is higher than 60 mN/m, the substance is not classified as surface active.
Reference
The apparatus was calibrated using ultrapure water with established surface tension. The calibration factor K was calculated to be 1.0017 by the ratio of the value (of surface tension) for water cited in the literature (mN/m) and the measured value (of surface tension) for water (mN/m) both at the same temperature (20 ± 1 °C)
Main test:
The equilibrium time for five separate measurements was in a range of 73 - 74 sec.
Equilibrium time = time after transferring the solution to the vessel until measuring the surface tension
The measured surface tension was multiplied by calibration factor K and than corrected according to Harkins and Jordan by 0.05 mN/m.
Surface tension (mN/m) Equilibrium time (sec)
70.8 73
71.0 73
71.0 74
71.0 74
71.0 73
Description of key information
The surface tension of the test item in an aqueous solution (12.4 mg/L) was found to be 71.0 mN/m at 20 °C, using the ring method. As this value is higher than 60 mN/m, the substance is not classified as surface active.
Key value for chemical safety assessment
- Surface tension:
- 71
- in mN/m at 20°C and concentration in mg/L:
- 12.4
Additional information
The surface tension of the test item in an aqueous solution (12.4 mg/L) was found to be 71.0 mN/m at 20 °C, using the ring method, representing the mean of five separate measurements performed according to OECD 115. As this value is higher than 60 mN/m, the substance is not classified as surface active.
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