Calcium bis(2-ethylhexanoate)

Surface tension

Link to relevant study record(s)

Reference

Endpoint:

surface tension

Type of information:

experimental study

Adequacy of study:

key 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:

60.22 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 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.

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.

Description of key information

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.

Key value for chemical safety assessment

Surface tension:

60.22

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

1 000