Registration Dossier
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EC number: 269-084-6 | CAS number: 68187-29-1
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:
- 21 September 2017
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 115 (Surface Tension of Aqueous Solutions)
- Version / remarks:
- 1995
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.5 (Surface Tension)
- Version / remarks:
- 2008
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- ring method
- Key result
- Surface tension:
- 26.4 mN/m
- Temp.:
- 21 °C
- Conc.:
- 0.98 g/L
- Conclusions:
- Under the conditions of the study the corrected surface tension of the test material was 26.4 mN/m. As the surface tension value was lower than 60 mN/m, the test material is classified as surface active.
- Executive summary:
The surface tension of the test material was determined in accordance with the standardised guidelines OECD 115 and EU Method A.5, using the ring method under GLP conditions.
The liquid to be measured was transferred to the measurement vessel. The measurement vessel was placed on the sample table. The sample was raised until the ring is 1 to 2 mm above the surface of the liquid. Then the measurement was started. In order to describe the time dependence of the surface tension after transferring the solution to the measurement vessel, the measurement was continued with increasing equilibrium time until a constant surface tension was reached. A constant surface tension was reached after about 333 sec. Afterwards, four further measurements were performed each after a minimum equilibrium time of 333 sec in order to confirm the value obtained by the first measurement.
The surface tension of the test material aqueous solution read on the instrument was 26.0 mN/m at 21 ± 0.5 °C using the ring method representing the mean of five separate measurements. The measured values were corrected with Harkins-Jordan correction factor.
Under the conditions of the study the corrected surface tension of the test material was 26.4 mN/m. As the surface tension value was lower than 60 mN/m, the test material is classified as surface active.
Reference
- The surface tension of the test material aqueous solution read on the instrument was 26.0 mN/m at 21 ± 0.5 °C using the ring method representing the mean of five separate measurements. The measured values were corrected with Harkins-Jordan
correction factor. The details are shown in Table 1. The measured surface tension was multiplied by Φb resulting in a corrected surface tension of 26.4 mN/m.
- As the surface tension value was lower than 60 mN/m, the test material is classified as surface active.
Table 1: Measured surface tension values and equilibrium times.
Surface tension (mN/m) |
Time (sec) |
26.01 |
333 |
25.99 |
357 |
25.98 |
382 |
25.98 |
405 |
25.97 |
430 |
Description of key information
Under the conditions of the study the corrected surface tension of the test material was 26.4 mN/m. As the surface tension value was lower than 60 mN/m, the test material is classified as surface active.
Key value for chemical safety assessment
- Surface tension:
- 26.4
- in mN/m at 20°C and concentration in mg/L:
- 980
Additional information
The surface tension of the test material was determined in accordance with the standardised guidelines OECD 115 and EU Method A.5, using the ring method under GLP conditions. The study was awarded a reliability score of 1 in accordance with the criteria set forth by Klimisch et al. (1997).
The liquid to be measured was transferred to the measurement vessel. The measurement vessel was placed on the sample table. The sample was raised until the ring is 1 to 2 mm above the surface of the liquid. Then the measurement was started. In order to describe the time dependence of the surface tension after transferring the solution to the measurement vessel, the measurement was continued with increasing equilibrium time until a constant surface tension was reached. A constant surface tension was reached after about 333 sec. Afterwards, four further measurements were performed each after a minimum equilibrium time of 333 sec in order to confirm the value obtained by the first measurement.
The surface tension of the test material aqueous solution read on the instrument was 26.0 mN/m at 21 ± 0.5 °C using the ring method representing the mean of five separate measurements. The measured values were corrected with Harkins-Jordan correction factor.
Under the conditions of the study the corrected surface tension of the test material was 26.4 mN/m. As the surface tension value was lower than 60 mN/m, the test material is classified as surface active.
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