Registration Dossier

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 guidelineopen allclose all
Qualifier:
according to
Guideline:
OECD Guideline 115 (Surface Tension of Aqueous Solutions)
Qualifier:
according to
Guideline:
EU Method A.5 (Surface Tension)
GLP compliance:
yes
Type of method:
ring method

Test material

Reference
Name:
Unnamed
Type:
Constituent
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 Fb = 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)

1st

24.9

2nd

25.5

3rd

24.7

4th

25.7

5th

25.7

6th

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