1H-Benz[de]isoquinoline-1,3(2H)-dione, 6-amino-, N,N'-bis[mixed 2-ethylhexyl and 3-[(2-ethylhexyl)oxy]propyl] derivs

Surface tension

Administrative data

Endpoint:

surface tension

Type of information:

experimental study

Adequacy of study:

key study

Study period:

2017

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2017

Report date:

2017

Materials and methods

Test guideline

Test guideline 1

Qualifier:

according to guideline

Guideline:

OECD Guideline 115 (Surface Tension of Aqueous Solutions)

Test guideline 2

Qualifier:

according to guideline

Guideline:

EU Method A.5 (Surface Tension)

GLP compliance:

yes

Type of method:

ring method

Test material

Test material information

Constituent 1

Reference substance name:

Raction product of 2-Ethyl-1-hexylamine and 3-(2-Ethylhexyloxy)propylamine with 4-bromo-1,8 naphthalic anhydride

Cas Number:

1971906-58-7

Molecular formula:

Not applicable (UVCB substance)

IUPAC Name:

Raction product of 2-Ethyl-1-hexylamine and 3-(2-Ethylhexyloxy)propylamine with 4-bromo-1,8 naphthalic anhydride

Test material form:

liquid: viscous

Specific details on test material used for the study:

Batch number: 78-242-15

Results and discussion

Surface tension

Surface tension:

26.8 mN/m

Temp.:

20 °C

Remarks on result:

other: test item 90% saturated solution

Any other information on results incl. tables

After zero point adjustment, the distilled water surface tension (sg) was determined to be 68.91; therefore the calibration factor was calculated to be F_b = 1.0558.

A saturated aqueous solution was prepared weighing 10.12 g of the test item into a 250 mL conical flask, adding 100 mL of water and stirring the suspension overnight.

To obtain a 90% saturated solution (to be tested according to the method’s indications), 90 mL of the previously prepared suspension, filtered by paper filter at 0.45 microm, were mixed with 10 mL of water. This clear solution was placed into a 45 mm diameter clean cylindrical glass vessel and the apparatus adjusted to zero.

The solution density has not been measured but, taking into consideration the test item water solubility, the distilled water density value has been used. 

Six measurements were performed at 20 ± 0.5°C maintained through a thermostatic liquid bath with external circulation.

Measurements	Test item 90% saturation (mN/m)
1^st	24.9
2^nd	25.5
3^rd	24.7
4^th	25.7
5^th	25.7
6^th	25.5
Average value	25.3
S.D.	0.44
RSD%	1.74%
Fb	1.0558
Corrected value	26.8

Applicant's summary and conclusion

Conclusions:

The surface tension of the test item 90% saturated solution is 26.8 mN/m at 20°C