Registration Dossier

Physical & Chemical properties

Surface tension

Currently viewing:

Administrative data

Link to relevant study record(s)

Referenceopen allclose all

Endpoint:
surface tension
Type of information:
experimental study
Adequacy of study:
supporting study
Study period:
2013-05-21 to 2013-06-05
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)
Remarks:
signed 2010-10-20
Type of method:
OECD harmonised ring method
Specific details on test material used for the study:
- Storage condition of test material: Store at ambient temperatures and at dry conditions.
Surface tension:
63.62 mN/m
Temp.:
20 °C
Conc.:
90 other: % saturated aqueous solution of Fatty acids, C16-18, barium salts
Remarks on result:
other: standard deviation of 0.04 mN/m

Determination of the density

The density of the 90 % saturated aqueous solution of Fatty acids,C16-18, barium salts in double-distilled water was determined in a preliminary measurement to be 1.017 g/cm³ (20.0 °C).

Temperature

The temperature range of the test solution during the whole measurements was 19.9 - 20.1 °C

The room temperature during these measurements was 20.3 - 21.0 °C

Time line of the study

After transfer of the test solution into the test vessel 53.0 minutes were needed to reach equilibrium at which 10 successive measurements with a standard deviation of 0.04 mN/m were possible

Surface tension of a 90 % saturated aqueous solution of Fatty acids,C16-18, barium salts

The determination was carried out in ten successive measurements with a standard deviation ≤ 0.05 mN/m.  

Measurement

no.*

Time**

[min]

Surface tension***

[mN/m]

Temperature *

[°C]

1

46.3

63.68

20.0

2

47.0

63.66

20.0

3

47.8

63.65

20.0

4

48.5

63.64

20.0

5

49.3

63.61

20.0

6

50.0

63.60

20.0

7

50.8

63.65

20.0

8

51.5

63.55

20.0

9

52.2

63.57

19.9

10

53.0

63.56

20.0

MV

-

63.62

     20.0

SD

-

0.04

 0.03

MV = mean value

SD = standard deviation
*) of the last 10 measurements

**) Time from transfer of the test solution into the test vessel until end of each measurement

***) Values already corrected acc. to Harkins & Jordan

Validation

The surface tension of the reference item hexane was determined on 2012-07-16 as 18.33 ± 0.02 mN/m (20 °C) for the Ring Nr. 1, RI 21. This value is in the range of tolerance of ± 1 mN/m acc. to the literature value of 18.42 mN/m at 20 °C.

Conclusions:
The surface tension of a 90 % saturated aqueous solution of Fatty acids, C16-18, barium salts at 20 °C was determined to be 63.62 mN/m (standard deviation of 0.04 mN/m). Due to the fact that the surface tension is > 60 mN/m, the test item is classified as not surface-active substance.
Endpoint:
surface tension
Type of information:
experimental study
Adequacy of study:
supporting study
Study period:
2013-05-21 to 2013-05-22
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)
Remarks:
signed 2010-10-20
Type of method:
OECD harmonised ring method
Surface tension:
42.98 mN/m
Temp.:
20 °C
Conc.:
1 g/L
Remarks on result:
other: standard deviation of 0.04 mN/m

Determination of the density

The density of the1 g/L aqueous solution of barium neodecanoate in double distilled water was determined in a preliminary measurement to be 1.002 g/cm³ (20.0 °C).

Temperature

The temperature range of the test solution during the whole measurements was 19.9 - 20.0 °C

The room temperature during these measurements was 19.7 - 20.5 °C

Time line of the study

After transfer of the test solution into the test vessel 60.2 minutes were needed to reach equilibrium at which 10 successive measurements with a standard deviation of 0.04 mN/m were possible

Surface tension of a 1 g/L aqueous solution of barium neodecanoate

The determination was carried out in ten successive measurements with a standard deviation ≤ 0.05 mN/m.  

Measurement

no.*

Time**

[min]

Surface tension***

[mN/m]

Temperature *

[°C]

1

54.0

43.05

20.0

2

54.7

43.03

20.0

3

55.3

43.04

20.0

4

56.0

43.00

20.0

5

56.7

42.97

20.0

6

57.4

42.98

20.0

7

58.1

42.97

20.0

8

58.8

42.94

20.0

9

59.5

42.93

20.0

10

60.2

42.93

20.0

MV

-

             42.98

             20.0

SD

-

0.04

0

MV = mean value

SD = standard deviation
*) of the last 10 measurements

**) Time from transfer of the test solution into the test vessel until end of each measurement

***) Values already corrected acc. to Harkins & Jordan

Validation

The surface tension of the reference item hexane was determined on 2012-07-16 as 18.33 ± 0.02 mN/m (20 °C) for the Ring Nr. 1, RI 21. This value is in the range of tolerance of ± 1 mN/m acc. to the literature value of 18.42 mN/m at 20 °C.

Conclusions:
The surface tension of a 1 g/L aqueous solution of barium neodecanoate at 20 °C was determined to be 42.98 mN/m (standard deviation of 0.04 mN/m). Due to the fact that the surface tension is < 60 mN/m, the test item is classified as surface-active substance.
Endpoint:
surface tension
Type of information:
experimental study
Adequacy of study:
supporting study
Study period:
2013-05-21 to 2013-05-22
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)
Remarks:
signed 2010-10-20
Type of method:
OECD harmonised ring method
Specific details on test material used for the study:
- Storage condition of test material: Sealed from atmosphere at room temperature
Surface tension:
47.63 mN/m
Temp.:
20 °C
Conc.:
1 g/L
Remarks on result:
other: standard deviation of 0.05 mN/m

Determination of the density

The density of the1 g/L aqueous solution of potassium 2-ethylhexanoate in double distilled water was determined in a preliminary measurement to be 1.012 g/cm³ (20.2 °C).

Temperature

The temperature range of the test solution during the whole measurements was 19.9 - 20.2 °C

The room temperature during these measurements was 19.6 - 20.5 °C

Time line of the study

After transfer of the test solution into the test vessel 110.9 minutes were needed to reach equilibrium at which 10 successive measurements with a standard deviation of 0.05 mN/m were possible

Surface tension of a 1 g/L aqueous solution of potassium 2-ethylhexanoate

The determination was carried out in ten successive measurements with a standard deviation ≤ 0.05 mN/m.  

Measurement

no.*

Time**

[min]

Surface tension***

[mN/m]

Temperature *

[°C]

1

104.5

47.72

19.9

2

105.3

47.68

20.0

3

106.0

47.66

20.0

4

106.7

47.64

20.0

5

107.4

47.60

20.0

6

108.1

47.63

20.0

7

108.8

47.61

19.9

8

109.5

47.62

20.0

9

110.2

47.59

20.0

10

110.9

47.55

19.9

MV

-

47.63

20.0

SD

-

0.05

0.05

MV = mean value

SD = standard deviation
*) of the last 10 measurements

**) Time from transfer of the test solution into the test vessel until end of each measurement

***) Values already corrected acc. to Harkins & Jordan

Validation

The surface tension of the reference item hexane was determined on 2012-07-16 as 18.33 ± 0.02 mN/m (20 °C) for the Ring Nr. 1, RI 21. This value is in the range of tolerance of ± 1 mN/m acc. to the literature value of 18.42 mN/m at 20 °C.

Conclusions:
The surface tension of a 1 g/L aqueous solution of barium neodecanoate at 20 °C was determined to be 42.98 mN/m (standard deviation of 0.04 mN/m). Due to the fact that the surface tension is < 60 mN/m, the test item is classified as surface-active substance.
Endpoint:
surface tension
Data waiving:
study scientifically not necessary / other information available
Justification for data waiving:
other:

Description of key information

Three tests on the surface tension according to OECD TG 115 were recently conducted for a representative sub-set of metal carboxylates substances, i.e. potassium 2-ethylhexanoate (carbon chain length: 8), barium neodecanoate (carbon chain length: 10) and fatty acids,C16-18, barium salts (carbon chain length: 16 and 18), yielding a result as surface-active substance for potassium 2-ethylhexanoate (47.63 mN/m) and barium neodecanoate (42.98 mN/m) and not surface-active substance for fatty acids, C16-18, barium salts (63.62 mN/m).  Since zinc bis(2-ethylhexanoate) represents an inorganic salt containing an anion of an acid with a carbon chain length of 8, it can safely be assumed that this substance is surface active. Thus further testing is not required (in accordance with regulation (EC) 1907/2006, Annex VII, section 7.6, Column 2).

Key value for chemical safety assessment

Additional information