Registration Dossier

Physical & Chemical properties

Surface tension

Currently viewing:

Administrative data

Link to relevant study record(s)

Reference
Endpoint:
surface tension
Type of information:
experimental study
Adequacy of study:
key study
Study period:
21 July 2016
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
EU Method A.5 (Surface Tension)
Deviations:
no
Qualifier:
equivalent or similar to
Guideline:
OECD Guideline 115 (Surface Tension of Aqueous Solutions)
Deviations:
no
GLP compliance:
not specified
Type of method:
ring method
Key result
Surface tension:
32.5 mN/m
Temp.:
20 °C
Conc.:
1 g/L

- Temperature differences were considered by entry of the density.

- Surface tension results are presented graphically in Diagram 1 (attached).

- Arithmetic mean of two test solutions = 32.0 ± 0.1 mN/M

- Arithmetric mean corrected by calibration factor determined via water calibration = 32.5 mN/m

Water calibration: Temperature 21 °C; ρ = 0.998 g/cm3

Surface tension of purified water

Value 1

71.3 mN/m

Value 2

71.5 mN/m

Value 3

71.4 mN/m

Value 4

71.3 mN/m

Value 5

71.3 mN/m

Value 6

71.4 mN/m

Arithmetic mean

71.4 mN/m

Standard deviation

0.1 mN/m

Arithmetic mean 71.4 mN/m; standard deviation 0.1 mN/m from the last six measurements (theoretical value: 72.4 mN/m; correction factor 1.0140).

First test solution: (c=1.460 g/L); Temperature = 22 °C; ρ = 0.998 g/cm3; age of solution 85 minutes

Surface tension of the solution

Value 1

31.9 mN/m

Value 2

31.9 mN/m

Value 3

31.9 mN/m

Value 4

31.9 mN/m

Value 5

31.9 mN/m

Value 6

31.9 mN/m

Arithmetic mean

31.9 mN/m

Standard deviation

0.0 mN/m

Arithmetic mean 31.8 mN/m; standard deviation 0.0 mN/m from six measurements

Second test solution: (c=1.026 g/L); Temperature = 21 °C; ρ = 0.998 g/cm3; age of solution 168 minutes

Surface tension of the solution

Value 1

32.0 mN/m

Value 2

32.1 mN/m

Value 3

32.0 mN/m

Value 4

32.1 mN/m

Value 5

32.1 mN/m

Value 6

32.1 mN/m

Arithmetic mean

32.1 mN/m

Standard deviation

0.0 mN/m

Arithmetic mean 32.1 mN/m; standard deviation 0.0 mN/m from six measurements

Conclusions:
The surface tension of the test item was determined to be 32.5 mN/m at 21 °C using a solution concentration of 1 g/L.
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 115. The test was performed in duplicate using test item concentrations of 1g/L in HPLC Gradient Grade water at 21 °C. Measurements were made using solutions aged for 85 minutes (first test) and 168 minutes (second test). Six single measurements were made per solution over a measuring time of more than 2500 seconds per solution. Both solutions were in an equilibrium state after approximately 1500 seconds. The calibration factor-corrected mean surface tension was 32.5 mN/m.

Description of key information

The surface tension of the test item was determined to be 32.5 mN/m at 21 °C using a solution concentration of 1 g/L (OECD 115 and EU Method A.5).

Key value for chemical safety assessment

Surface tension:
32.5
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 115. The test was performed in duplicate using test item concentrations of 1g/L in HPLC Gradient Grade water at 21 °C. Measurements were made using solutions aged for 85 minutes (first test) and 168 minutes (second test). Six single measurements were made per solution over a measuring time of more than 2500 seconds per solution. Both solutions were in an equilibrium state after approximately 1500 seconds. The calibration factor-corrected mean surface tension was 32.5 mN/m.