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EC number: 305-928-2 | CAS number: 95370-65-3
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:
- 32.5 mN/m
- Temp.:
- 21 °C
- Conc.:
- 0.978 g/L
- Conclusions:
- Under the conditions of this study, the surface tension of the test material was 32.5 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 investigated in accordance with the standardised guidelines OECD 115 and EU Method A.5, under GLP conditions with a tensiometer using the ring method.
The surface tension of the test material aqueous solution read on the instrument was 32.0 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 measured surface tension was multiplied by Φb resulting in a corrected surface tension of 32.5 mN/m.
Under the conditions of this study, the surface tension of the test material was 32.5 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 32.0 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 measured surface tension was multiplied by Φb resulting in a corrected surface tension of 32.5 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) |
32.14 |
334 |
32.06 |
358 |
32.01 |
382 |
31.98 |
405 |
31.94 |
429 |
Description of key information
Under the conditions of this study, the surface tension of the test material was 32.5 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:
- 32.5
- in mN/m at 20°C and concentration in mg/L:
- 978
Additional information
The surface tension of the test material was investigated in accordance with the standardised guidelines OECD 115 and EU Method A.5, under GLP conditions with a tensiometer using the ring method.
The surface tension of the test material aqueous solution read on the instrument was 32.0 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 measured surface tension was multiplied by Φb resulting in a corrected surface tension of 32.5 mN/m.
Under the conditions of this study, the surface tension of the test material was 32.5 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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