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Physical & Chemical properties

Surface tension

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Administrative data

Endpoint:
surface tension
Type of information:
migrated information: read-across from supporting substance (structural analogue or surrogate)
Adequacy of study:
supporting study
Study period:
2013-05-21 to 2013-05-22
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: GLP guideline study

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2013
Report date:
2013

Materials and methods

Test guidelineopen allclose all
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

Test material

Constituent 1
Chemical structure
Reference substance name:
Calcium bis(2-ethylhexanoate)
EC Number:
205-249-0
EC Name:
Calcium bis(2-ethylhexanoate)
Cas Number:
136-51-6
Molecular formula:
C8H16O2.1/2Ca
IUPAC Name:
calcium bis(2-ethylhexanoate)
Test material form:
solid
Details on test material:
- Name of test material (as cited in study report): Calcium bis(2-ethylhexanoate)
- Physical state: Cream coloured solid
- Water solubility: 80.37 g/L (OECD 105, EU A.6)
- Stability under test conditions: Assumed to be stable
- Storage condition of test material: Store in cool dark environment away from direct light

Results and discussion

Surface tension
Surface tension:
60.22 mN/m
Temp.:
20 °C
Conc.:
1 g/L
Remarks on result:
other: standard deviation of 0.04 mN/m

Any other information on results incl. tables

Determination of the density

The density of the1 g/L aqueoussolution of calcium bis(2-ethylhexanoate) in double-distilled water was determined in a preliminary measurement to be 1.008 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 19.8 - 20.1 °C

Time line of the study

After transfer of the test solution into the test vessel 54.0 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 of a 1 g/L aqueous solution of calcium bis(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

47.3

60.30

19.9

2

48.1

60.26

20.0

3

48.8

60.23

20.0

4

49.6

60.27

20.0

5

50.3

60.16

19.9

6

51.1

60.21

20.0

7

51.8

60.19

20.0

8

52.6

60.19

20.0

9

53.3

60.21

19.9

10

54.0

60.18

19.9

MV

-

         60.22

20.0

SD

-

0.04

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.

Applicant's summary and conclusion

Conclusions:
The surface tension of a 1 g/L aqueous solution of calcium bis(2-ethylhexanoate) at 20 °C was determined to be 60.22 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.

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