2-(2,6-diethyl-4-methyl-phenyl)propanediamide

Surface tension

Link to relevant study record(s)

Reference

Endpoint:

surface tension

Type of information:

experimental study

Adequacy of study:

key study

Study period:

06 October 2003 to 18 November 2003

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

Qualifier:

according to guideline

Guideline:

other: ISO 304 ("Surface active agents - Determination of Surface Tension by Drawing up Liquid Films").

Deviations:

no

GLP compliance:

yes

Type of method:

plate method

Surface tension:

55.3 mN/m

Temp.:

20 °C

Conc.:

1 g/L

Table 2: Results

Solution	1. determination	2. determination
Time (min)	σcorr (mN/m)	σcorr (mN/m)
0	55.4	54.5
5	55.9	54.7
10	56.0	54.8
Average	55.8	54.7
Average of independent measurements	55.3

 

Temperature: 20 ± 0.3 ºC

Conclusions:

Under the conditions of the test, the surface tension of the test material dissolved in pure water at a concentration of 1 g/L (supernatant after centrifugation) at a temperature of 20 °C was determined to be 55.3 mN/m. The test substance meets the EU definition of surface active. The study is considered to be reliable, relevant and adequate for risk assessment purposes.

Executive summary:

The surface tension of the test material was determined in accordance with the standardised guidelines OECD 115 and EU Method A.5 using the plate method (with the platinum plate to allow proper assessment of the time dependence of the surface tension). Under the conditions of the test, the surface tension of the test material dissolved in pure water at a concentration of 1 g/L (supernatant after centrifugation) at a temperature of 20 °C was determined to be 55.3 mN/m. The test substance meets the EU definition of surface active.

Description of key information

55.3 mN/m, 20 °C, concentration of 1 g/L, OECD TG 115, EU Method A.5, Martin 2003

Key value for chemical safety assessment

Surface tension:

55.3

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

1 000

Additional information

The surface tension of the test material was determined in accordance with the standardised guidelines OECD 115 and EU Method A.5 using the plate method (with the platinum plate to allow proper assessment of the time dependence of the surface tension). Under the conditions of the test, the surface tension of the test material dissolved in pure water at a concentration of 1 g/L (supernatant after centrifugation) at a temperature of 20 °C was determined to be 55.3 mN/m. The test substance meets the EU definition of a surface active substance.

The study was performed in line with GLP and an accepted standardised guideline with a high standard of reporting. The study was assigned a reliability score of Klimisch 1 and considered suitable for assessment as an accurate reflection of the test substance.

The available data are considered complete and the result determined, 55.3 mN/m at 20 °C and a concentration of 1 g/L, was taken forward for risk assessment.