Condensation products of triethanolamine with addition products of fatty acids, C18 (unsaturated) alkyl with maleic anhydride

Surface tension

Link to relevant study record(s)

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

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:

OECD harmonised ring method

Key result

Surface tension:

69.5 mN/m

Temp.:

20 °C

Conc.:

90 other: % saturated aqueous solution

Time	Surface tension (mN/m)
(minutes)	(calibration corrected)
	A	B
0	72.2	70.2
5	72.2	70.2
10	71.2	70.2
15	70.2	70.2
20	70.2	69.7
25	70.7	69.7
30	70.2	70.7

 

Overall mean calibration corrected surface tension = 70.5 mN/m

Harkins-Jordan* corrected value = 69.5 mN/m

 

*: HARKINS, W.D. and JORDAN, H.F., J. Amer. Chem. Soc.52, 1751 (1930).

Conclusions:

The test substance is not considered to be surface active (surface tension >60 mN/m).

Description of key information

69.5 mN/m (90% satuarated aqueous solution at 20°C) (OECD 115, EC A.5)

Additional information

Surface tension 69.5 mN/m at 20°C and 90% satuarated aqueous solution