Registration Dossier
Registration Dossier
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EC number: 271-547-2 | CAS number: 68585-02-4
Surface tension
Administrative data
Link to relevant study record(s)
- Endpoint:
- surface tension
- Type of information:
- experimental study
- Adequacy of study:
- key study
- 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
- GLP compliance:
- no
- Type of method:
- plate method
- Key result
- Surface tension:
- 65.21 mN/m
- Temp.:
- 19.94 °C
- Conc.:
- 0.2 g/L
- Conclusions:
- The surface tension of Octadecanoic acid, reaction products with acetic acid and tetraethylenepentamine determined with the Wilhelmy plate method was 65.21±0.14 mN/m at 19.94±0.01°C.
- Executive summary:
The surface tension of an aqueous solution of octadecanoic acid, reaction products with acetic acid and tetraethylenepentamine was determined using the Wilhelmy plate method (OECD 115; 1995).
For this purpose, the stock solution was produced by shaking the test item solution in a PFA-bottle at 30°C for 72 h followed by 24 h equilibration at 20°C, to achieve the highest possible concentration.
The result was corrected by water calibration.
The surface tension of octadecanoic acid, reaction products with acetic acid and tetraethylenepentamine was determined using the Wilhelmy plate method
to be:
Surface tension = 65.21±0.14 mN/m (at 19.94±0.01°C)
The surface tension of the aqueous solution of octadecanoic acid, reaction products with acetic acid and tetraethylenepentamine is with 65 mN/m slightly above the threshold value of 60 mN/m, and should therefore not be considered a surface active material.
Reference
Description of key information
The surface tension of the aqueous solution of octadecanoic acid, reaction products with acetic acid and tetraethylenepentamine is with 65 mN/m slightly above the threshold value of 60 mN/m, and should therefore not be considered a surface active material.
Key value for chemical safety assessment
- Surface tension:
- 65.21
- in mN/m at 20°C and concentration in mg/L:
- 200
Additional information
The surface tension of an aqueous solution of octadecanoic acid, reaction products with acetic acid and tetraethylenepentamine was determined using the Wilhelmy plate method (OECD 115; 1995).
For this purpose, the stock solution was produced by shaking the test item solution in a PFA-bottle at 30°C for 72 h followed by 24 h equilibration at 20°C, to achieve the highest possible concentration.
The result was corrected by water calibration.
The surface tension of octadecanoic acid, reaction products with acetic acid and tetraethylenepentamine was determined using the Wilhelmy plate method
to be:
Surface tension = 65.21±0.14 mN/m (at 19.94±0.01°C)
The surface tension of the aqueous solution of octadecanoic acid, reaction products with acetic acid and tetraethylenepentamine is with 65 mN/m slightly above the threshold value of 60 mN/m, and should therefore not be considered a surface active material.
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