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EC number: 214-540-1 | CAS number: 1143-72-2
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:
- 2016-02-23 to 2016-02-24
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.5 (Surface Tension)
- Version / remarks:
- 2008
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 115 (Surface Tension of Aqueous Solutions)
- Deviations:
- no
- GLP compliance:
- no
- Type of method:
- ring method
- Key result
- Surface tension:
- > 60 mN/m
- Temp.:
- 20 °C
- Conc.:
- 1 g/L
- Remarks on result:
- other: Not surface-active.
- Conclusions:
- The surface tension of the aqueous solution of the test item at 20 °C was higher than 60 mN/m. The test item had no surface active properties.
- Executive summary:
The surface tension was determined according to OECD 115 and A.5. European Commission Regulation (EC) No. 440/2008 using the ring method. The method is based on the measurement of the maximum vertical force, which is necessary to separate a ring being in contact with the liquid filled in a measuring cup from the surface of this liquid. Due to the fact that the surface tension showed a time-dependence no mean value could be reported. However, the surface tension of the aqueous solution of the test item at 20 °C was higher than 60 mN/m. The test item had no surface active properties.
Reference
Results
Table 1 – Surface tension results
Measurement |
1 |
2 |
3 |
4 |
5 |
6 |
Time [s] |
31 |
93 |
155 |
216 |
278 |
340 |
σ[mN/m] uncorrected |
77.85 |
77.80 |
77.78 |
77.74 |
77.70 |
77.66 |
σ[mN/m] corrected according to Zuidema and Waters1 |
72.35 |
72.30 |
72.28 |
72.24 |
72.19 |
72.16 |
1Zuidema, H., Waters, C.W., Ind. Eng. Chem. Analyt. 13 (1941), p312
The surface tension showed a time-dependence, thus no mean value could be reported. It was > 60 mN/m (20 °C) , therefore the test item has no surface active properties.
Description of key information
The surface tension of the aqueous solution of the test item at 20 °C was higher than 60 mN/m. The test item had no surface active properties.
Key value for chemical safety assessment
Additional information
The surface tension was determined according to OECD 115 and A.5. European Commission Regulation (EC) No. 440/2008 using the ring method. The method is based on the measurement of the maximum vertical force, which is necessary to separate a ring being in contact with the liquid filled in a measuring cup from the surface of this liquid. Due to the fact that the surface tension showed a time-dependence no mean value could be reported. However, the surface tension of the aqueous solution of the test item at 20 °C was higher than 60 mN/m. The test item had no surface active properties.
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