Registration Dossier
Registration Dossier
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EC number: 618-848-0 | CAS number: 92413-47-3
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:
- 04.12.91 - 23.05.92
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.5 (Surface Tension)
- 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:
- 64.48 mN/m
- Temp.:
- 20 °C
- Conc.:
- 0 g/L
- Conclusions:
- The surface tension of the aqueous solution of the test item at 20 °C was 63.9 mN/m.
- Executive summary:
The surface tension was determined according to OECD 115 and EU A.5. 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. The surface tension of the aqueous solution of the test item at 20 °C was 63.9 mN/m.
Reference
Calibration
To calibrate the devices, the surface tension of destilled water was measured and compared with the value as published in the literature.
Table: Calibration
Measurement |
Surface tension in mN/m |
1 |
73.4 |
2 |
73.4 |
3 |
73.4 |
Mean |
73.4 |
The published surface tension for water is 72.75 nM/m, leading to a callibration factor of 0.991.
Table: Measurement
Time/min |
Surface tension in mN/m |
5 |
64.0 |
10 |
64.6 |
15 |
64.9 |
20 |
65.0 |
25 |
65.1 |
30 |
65.4 |
Mean |
65.1 |
Correction of the surface tension: 64.48 mN/m x 0.991 = 64.48 mN/m
Correction according to Harkins & Jordan: 63.9 mN/m
Description of key information
The surface tension of the aqueous solution of the test item at 20 °C was 63.9 mN/m.
Key value for chemical safety assessment
- Surface tension:
- 63.9
- in mN/m at 20°C and concentration in mg/L:
- 0.1
Additional information
The surface tension was determined according to OECD 115 and EU A.5. 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. The surface tension of the aqueous solution of the test item at 20 °C was 63.9 mN/m.
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