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Physical & Chemical properties

Surface tension

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Reference
Endpoint:
surface tension
Type of information:
experimental study
Adequacy of study:
key study
Study period:
From November 08, 2017 to February 07, 2018
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
guideline study with acceptable restrictions
Remarks:
non-GLP and not determined for 90% saturated solution as required by the Guideline
Reason / purpose:
reference to same study
Qualifier:
according to
Guideline:
OECD Guideline 115 (Surface Tension of Aqueous Solutions)
Deviations:
no
Qualifier:
according to
Guideline:
EU Method A.5 (Surface Tension)
Deviations:
no
GLP compliance:
no
Remarks:
The study was conducted in a facility which operates in accordance with Good Laboratory Practice principles; however no claim of GLP compliance was intended nor is made for this study
Type of method:
ring method
Key result
Surface tension:
ca. 43 mN/m
Temp.:
20 °C
Conc.:
1 g/L

Results

The readings and temperatures for the sample solutions are shown in the following table:

Table1: Surface tension values

Concentration (mg/L)

Reading (mN/m)

Temperature (°C)

1.036 x 104

40.0

20.0

40.0

20.0

40.0

20.0

3.109 x 103

42.5

20.0

42.5

20.0

42.5

20.0

1.036 x 103

43.0

20.0

43.0

20.0

43.0

20.0

310.9

44.5

20.0

44.5

20.0

44.5

20.0

103.6

45.0

20.0

45.0

20.0

45.0

20.0

31.09

49.0

20.0

49.0

20.0

49.0

20.0

10.36

53.5

20.0

53.5

20.0

53.5

20.0

6.218

62.0

20.0

62.0

20.0

62.0

20.0

3.109

59.5

20.0

61.5

20.0

63.5

20.0

64.5

20.0

65.0

20.0

66.0

20.0

66.5

20.0

67.5

20.0

67.5

20.0

67.5

20.0

2.072

68.0

20.0

68.0

20.0

69.5

20.0

69.5

20.0

69.5

20.0

1.036

69.0

20.0

71.0

20.0

72.0

20.0

72.0

20.0

72.0

20.0

0.3109

73.0

20.0

73.0

20.0

73.0

20.0

Mean surface tension values were based on the last three readings for a particular concentration which were considered to be constant.

The concentration (mg/L), log10 [concentration (mg/L)] and mean surface tension values for the sample solutions are shown in the following table:

 

Table 2: The concentration (mg/L), log10 [concentration (mg/L)] and mean surface tension values

Concentration
(
mg/L)

Log10Concentration

Mean Surface Tension (mN/m)

Solution pH

1.036 x 104

4.015

40.0

4.03

3.109 x 103

3.493

42.5

4.35

1.036 x 103

3.015

43.0

4.62

310.9

2.493

44.5

4.81

103.6

2.015

45.0

5.01

31.09

1.493

49.0

5.08

10.36

1.015

53.5

5.32

6.218

0.794

62.0

5.51

3.109

0.493

67.5

5.54

2.072

0.316

69.5

5.29

1.036

0.015

72.0

5.66

0.311

-0.507

73.0

5.63

The surface tension at 1 g/L was determined to be 43.0 ± 0.5 mN/m.

Conclusions:
Under the study conditions, the surface tension of 1 g/L nominal aqueous dispersion of test substance was determined to be 43 ± 0.5 mN/m at 20 ± 0.5ºC; therefore was considered to be surface-active.
Executive summary:

A study was conducted to determine the surface tension of the test substance, 'iso and anteiso C10-40 AAP EDM-ES' (active: 96%), using the ring method, according to OECD Guideline 115 and EU Method A.5. Under the study conditions, the surface tension of 1 g/L nominal aqueous dispersion of test substance was determined to be 43 ± 0.5 mN/m at 20 ± 0.5ºC. Therefore, the test substance was considered to be surface-active (Envigo, 2018).

Description of key information

The surface tension of the test substance was determined using the ring method, according to OECD Guideline 115 and EU Method A.5 (Envigo, 2018).

Key value for chemical safety assessment

Surface tension:
43
in mN/m at 20°C and concentration in mg/L:
20

Additional information

(surface active)