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EC number: 263-038-9 | CAS number: 61789-18-2
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:
- From 24 April, 2008 to 25 April, 2008
- 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)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.5 (Surface Tension)
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- ring method
- Key result
- Surface tension:
- 24.04 mN/m
- Temp.:
- 20 °C
- Conc.:
- 1 g/L
- Remarks on result:
- other: Standard deviation: 0.05%
- Executive summary:
A study was conducted to determine the surface tension and critical micelle concentration of the test substance, TMAC C (99.6% active), according to OECD 115 and EU A.5 Guidelines, in compliance with GLP. 1 g/L (total volume 200 mL), prepared in HPLC water, was used to determine the surface tension in 10 measurements with a tensiometer. Different concentrations of the test substance in the range of 0.05 to 10 g/L (total volume 200 mL), prepared in HPLC water, were applied for the determination of critical micelle concentration at a temperature of 20°C. Under the study conditions, the surface tension and the CMC of the test substance were determined to be 24.04 +/- 0.05 mN/m and 1 g/L respectively (Bodsch, 2008).
Reference
Surface tension of the test substance at different concentrations:
Concentration (g/L) |
Surface tension (mN/m) |
Mean temperature (⁰C) |
0.05 |
45.52 |
19.9 |
0.20 |
31.81 |
20 |
0.35 |
30.29 |
19.9 |
0.50 |
24.60 |
20 |
0.75 |
24.13 |
20 |
1 |
24.04 |
20 |
5 |
31.88 |
19.7 |
10 |
33.98 |
19.9 |
Description of key information
Under the study conditions, the surface tension and the CMC of the test substance were determined to be 24.04 +/- 0.05 mN/m and 1 g/L respectively.
Key value for chemical safety assessment
- Surface tension:
- 24.04
- in mN/m at 20°C and concentration in mg/L:
- 1 000
Additional information
The surface tension was determined according to OECD Guideline 115 and EU Method A.5 (Bodsch, 2008).
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