Fatty acids, tall-oil, polymers with glycidyl neodecanoate

Surface tension

Link to relevant study record(s)

Reference

Endpoint:

surface tension

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2014

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

GLP compliance:

not specified

Type of method:

OECD harmonised ring method

Key result

Surface tension:

44.3 mN/m

Temp.:

23 °C

Conc.:

40 mg/L

Remarks on result:

other: Method used- du Noüy ring

Conclusions:

The surface tension of an aqueous solution of test substance (40 mg/L) was 44.3 mN/m at 23°C.

Executive summary:

A study was conducted to determine the surface tension of the test substance according to OECD Guideline 115, using the K11 MK4 tensiometer of Krüss and the du Noüy ring method at 23°C. A saturate solution was prepared in deionized water. A platinum-iridium (PtIr) ring with a diameter (=2R) of ca. 2 cm was then dipped into the vessel containing the aqueous solution. The surface tension was calculated according toϒ=Ff/4πR, where F is the maximum equilibrium force and f is a correction factor which accounts for the volume of the raised liquid, the ring and the wire radii. Under the study conditions, the surface tension of aqueous solution of test substance (40 mg/L) was 44.3 mN/m at 23°C (Boutreau, 2014).

Description of key information

The surface tension of an aqueous solution of test substance was determined according to OECD Guideline 115 (Boutreau, 2014).

Key value for chemical safety assessment

Surface tension:

44.3

in mN/m at 20°C and concentration in mg/L:

40