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Physical & Chemical properties

Surface tension

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Reference
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:
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.

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.