Fatty acids, C12-18 (even numbered)-methyl esters, sulfonated, sodium salts

Surface tension

Link to relevant study record(s)

Reference

Endpoint:

surface tension

Type of information:

experimental study

Adequacy of study:

key study

Study period:

19th - 20th May, 2016

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Qualifier:

according to guideline

Guideline:

EU Method A.5 (Surface Tension)

Deviations:

no

Qualifier:

according to guideline

Guideline:

OECD Guideline 115 (Surface Tension of Aqueous Solutions)

Deviations:

no

GLP compliance:

not specified

Type of method:

ring method

Key result

Surface tension:

31.9 mN/m

Temp.:

20 °C

Conc.:

1 g/L

Water calibration: Temp = 20 °C, p = 0.998 g/cm³

Surface tension of purified water (mN/m)
1	71.5
2	71.8
3	71.7
4	71.7
5	71.7
6	71.6
Arithmetic mean	71.7
Standard deviation	0.1

 

Arithmetic mean 71.7 mN/m, standard deviation 0.1 mN/m from 6 measurements (theoretical value: 72.6 mN/m; correct factor 1.0126)

First test solution: (c=1.372 g/L), Temp = 20 °C, p = 0.998 g/cm³, age of solution = 1375 min

Surface tension of solution (mN/m)
1	31.0
2	31.0
3	31.0
4	31.0
5	31.0
6	31.0
Arithmetic mean	31.0
Standard deviation	0.1

 

Arithmetic mean 31.0 mN/m, standard deviation 0.1 mN/m from 6 measurements

Second test solution: (c=1.017 g/L), Temp = 20 °C, p = 0.998 g/cm³, age of solution = 1750 min

Surface tension of solution (mN/m)
1	32.0
2	32.0
3	32.0
4	32.0
5	31.9
6	31.9
Arithmetic mean	32.0
Standard deviation	0.1

 

Arithmetic mean 32.0 mN/m, standard deviation 0.1 mN/m from 6 measurements

Arithmetic mean of two test solution: 31.5 mN/m (±mN/m)

Arithmetic mean corrected by calibration factor determined via water calibration: 31.9 mN/m

Conclusions:

The surface tension of the test item at a concentration of 1g/L is 31.9 mN/m.

Executive summary:

The surface tension of the test item was measured in a study performed according to EU Method A.5 as described in Commission Regulation (EC) No. 440/2008 and OECD TG 115. The test was performed in duplicate using test item concentrations of 1g/L in HPLC Gradient Grade water at 20 °C. Measurements were made using solutions aged for 1375 and 1750 minutes, respectively. Six single measurements were made per solution over a measuring time of more than 5000 seconds per solution. Both solutions were in an equilibrium state after approximately 1500 seconds. The calibration factor-corrected mean surface tension was 31.9 mN/m.

Description of key information

The surface tension of the test item is 31.9 mN/m

Key value for chemical safety assessment

Surface tension:

31.9

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

1 000

Additional information

The surface tension of the test item was measured in a study performed according to EU Method A.5 as described in Commission Regulation (EC) No. 440/2008 and OECD TG 115. The test was performed in duplicate using test item concentrations of 1g/L in HPLC Gradient Grade water at 20 °C. Measurements were made using solutions aged for 1375 and 1750 minutes, respectively. Six single measurements were made per solution over a measuring time of more than 5000 seconds per solution. Both solutions were in an equilibrium state after approximately 1500 seconds. The calibration factor-corrected mean surface tension was 31.9 mN/m.