2,6-Octadienal, 3,7-dimethyl-, acid-isomerized

Surface tension

Link to relevant study record(s)

Reference

Endpoint:

surface tension

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2017-08-09 to 2017-08-11

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)

Version / remarks:

1995

Deviations:

no

Qualifier:

according to guideline

Guideline:

EU Method A.5 (Surface Tension)

Version / remarks:

2008

Deviations:

no

GLP compliance:

no

Type of method:

ring method

Key result

Surface tension:

48.17 mN/m

Temp.:

20 °C

Remarks on result:

other: corrected mean surface tension as 90% saturated aqueous solution

- Density of the test solution: 1.000 g/cm3 (20.1 °C)

- Temperature: 20.0 - 20.1 °C

- Time lines of the determination of the surface tensions: Start of measurement was 20.4 minutes after transfer of the test solution into the test vessel. After that time, 20.54 minutes were needed to reach equilibrium at which 10 successive measurements were successfully achieved with a standard deviation of < 0.05 mN/m.

- Surface Tension of test item:

Measurement No.	Time [min]	Time [min]	Surface Tension [mN/m]	Temperature [°C]
1	34.45	14.09	48.26	20.1
2	35.17	14.80	48.23	20.1
3	35.88	15.52	48.21	20.1
4	36.61	16.24	48.17	20.1
5	37.33	16.96	48.17	20.1
6	38.02	17.65	48.16	20.1
7	38.76	18.40	48.13	20.1
8	39.49	19.13	48.12	20.1
9	40.21	19.84	48.12	20.1
10	40.90	20.54	48.13	20.1
Mean	-	-	48.17	20.1
SD [±]	-	-	0.050.0	0.0

There is a time dependence on the measured surface tension, with a decrease in time.

- Determination of the reference Item: 20.15 ± 0.01 mN/m (20 °C) for the platinum iridium ring Rl 21

- Validity Criteria: The temperature of the test solution was 20 ± 0.5 °C

Conclusions:

The surface tension of a 90% saturated aqueous solution of the test item at 20 °C was determined to be: 48.17 mN/m (standard deviation ± 0.05 mN/m).

Executive summary:

The surface tension of an aqueous solution with a concentration of 90% of the saturation concentration of the test item was determined according to OECD 115 and EC A.5 with the OECD harmonized ring method.

The determination was carried out with a tensiometer in ten successive measurements with a standard deviation < 0.05 mN/m at a temperature of 20 ± 0.5 °C.

The surface tension of a 90% saturated aqueous solution of the test item at 20 °C was determined to be: 48.17 mN/m (standard deviation ± 0.05 mN/m).Since the test item showed a surface tension lower than 60 mN/m under the conditions of this referring method, the test item should be regarded as being surface-active material.

Description of key information

The surface tension of an aqueous solution with a concentration of 90% of the saturation concentration of the test item was determined according to OECD Guideline 115 and EC Method A.5 with the OECD harmonized ring method.

The determination was carried out with a tensiometer in 10 successive measurements with a standard deviation < 0.05 mN/m at a temperature of 20 ± 0.5 °C. The surface tension of a 90% saturated aqueous solution of the test item at 20 °C was determined to be: 48.17 mN/m (standard deviation ± 0.05 mN/m). The test substance should be regarded as being surface-active.

Key value for chemical safety assessment

Surface tension:

48.17

Additional information

The surface tension of a 90% saturated aqueous solution of the test item at 20 °C was determined to be: 48.17 mN/m (standard deviation ± 0.05 mN/m).