Registration Dossier
Registration Dossier
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EC number: 429-100-6 | CAS number: 23911-56-0
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:
- 2006-06-20
- 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)
- Version / remarks:
- 1995
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- ring method
- Key result
- Surface tension:
- 57.5 mN/m
- Temp.:
- 20 °C
- Conc.:
- 170.1 mg/L
- Conclusions:
- The mean surface tension was determined to be 57.5 mN/m.
- Executive summary:
The surface tension of the registered substance was determined in an experimental study under GLP conditions according to EU Method A.5. and OECD Test Guideline 115 using the ring method. The surface tension was determined with a test item concentration of 170.1 mg/L at 20 °C. The mean surface tension was 57.5 mN/m.
Reference
Table: Results of the calibration of the apparatus using de-ionized water at 20 °C
Measurement |
1 |
2 |
3 |
4 |
5 |
6 |
Time / min |
0 |
5 |
10 |
15 |
20 |
25 |
σ / mN/m |
72.5 |
72.4 |
72.5 |
72.4 |
72.4 |
72.4 |
The average surface tension was determined to: σE = 72.433 mN/m.
The calibration factor F was calculated with respect to the literature value for water at 20 °C (σlit = 72.58 mN/m):
F = σlit / σE= 1.0020
Table: Results of the surface tension of the test item in de-ionized water with a concentration of 170.1 mg/L.
Measurement |
1 |
2 |
3 |
4 |
5 |
6 |
Time / min |
0 |
5 |
10 |
15 |
20 |
25 |
σ / mN/m |
58.5 |
58.4 |
58.4 |
58.4 |
58.3 |
58.3 |
Mean value: σ = 58.383 mN/m
The mean value, multiplied by the calibration factor (F=1.0020) yields to:
σF = σ • F = 58.502 mN/m
After correction with respect to the table given in the consolidated version of Council Directive 67/548/EEC Annex V (Council Directive 92/69/EEC) method A.5. (Harkins-Jordan correction), the final value for the surface tension at 20 °C is:
σ = 57.5 mN/m
Description of key information
The mean surface tension was determined to be 57.5 mN/m.
Key value for chemical safety assessment
- Surface tension:
- 57.5
- in mN/m at 20°C and concentration in mg/L:
- 170.1
Additional information
The surface tension of the registered substance was determined in an experimental study under GLP conditions according to EU Method A.5. and OECD Test Guideline 115 using the ring method. The surface tension was determined with a test item concentration of 170.1 mg/L at 20 °C. The mean surface tension was 57.5 mN/m.
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