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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
Study period:
02/07/2012 - 04/07/2012
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
EU Method A.5 (Surface Tension)
Deviations:
no
GLP compliance:
yes (incl. certificate)
Type of method:
ring method
Key result
Surface tension:
35 mN/m
Temp.:
20 °C
Conc.:
1 g/L
Remarks on result:
other: The surface tension result is corrected for water calibration. Solution age was 98 minutes for test No 1 and 95 minutes for test No 2.

The surface tension decreased over time, starting at 36 mN/m after a standing time of 10 minutes to a final stable reading of 35 mN/m after 95 to 98 minutes.

Conclusions:
The surface tension of the substance was determined to be 35.0 mN/m at a test concentration of 1 g/L and at 20 °C. The substance is concluded to have surface active properties.

Description of key information

The surface tension of Amides, C12-18 (even numbered), N-[3-(dimethylamino)propyl], N'-oxides was determined in a GLP study according to test method EC A.5, to be 35.0 mN/m at a test concentration of 1 g/L and at 20 °C, following the ring method (Younis S, 2012).

Key value for chemical safety assessment

Surface tension:
35
in mN/m at 20°C and concentration in mg/L:
1 000

Additional information

The substance is concluded to have surface active properties.