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Surface tension

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surface tension
Type of information:
experimental study
Adequacy of study:
key study
Study period:
24 January 2012-16 May 2012
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
according to guideline
EU Method A.5 (Surface Tension)
according to guideline
OECD Guideline 115 (Surface Tension of Aqueous Solutions)
GLP compliance:
yes (incl. QA statement)
Type of method:
ring method
Surface tension:
>= 31.4 - <= 31.5 mN/m
21.5 °C
1.02 g/L
C10 AO is surface active
Executive summary:

The surface tension of N,N-dimethyldecylamine N-oxide has been determined to be in the range 31.4 -31.5 mN/m at a concentration of 1.02 g/L at 21.5 +/-0.5 °C using a ring method designed to be compatible with Method A5 Surface Tension of Commission Regulation (EC) No 440/2008 and OECD TG 115. The substance is considered to be surface-active.

Description of key information

The surface tension is 31.4 -31.5 mN/m at 21.5 +/-0.5 °C

Key value for chemical safety assessment

Surface tension:
in mN/m at 20°C and concentration in mg/L:
1 020

Additional information

The surface tension of the substance was measured in a test conducted in accordance with the procedure described in EU Regulation (EC) 440/2008, Annex Part A test A5 (ring method) under GLP [Woolley AJ (2012 )]. Due to the high solubility of the substance, a concentration of 1.02 g/L was used. Measurements were made in duplicate. The derived value for surface tension was 31.4 -31.5 mN/m at 21.5 +/-0.5 °C. The substance is considered to be surface-active.