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Administrative data

Endpoint:
surface tension
Type of information:
experimental study
Adequacy of study:
key study
Study period:
25.-28. July 2011
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Study performed according to OECD/EU testing guideline, but not GLP

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2011
Report date:
2011

Materials and methods

Test guidelineopen allclose all
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:
no
Type of method:
ring method

Test material

Constituent 1
Reference substance name:
Absorbent N grade A
IUPAC Name:
Absorbent N grade A
Details on test material:
- Name of test material (as cited in study report): Absorbent N grade A
- Substance type: UVCB
- Physical state: Brown liquid
- Stability under test conditions: months
- Storage condition of test material: room temperature, in the dark

Results and discussion

Surface tension
Surface tension:
60.2 mN/m
Temp.:
20 °C

Any other information on results incl. tables

 Individual Results

The water solubility was stated to be 0.5 g/l. Therefore a solution of 0.1006 g in 200 ml water was prepared. The solution was stirred at room temperature for 69 h. Subsequently the solution was filtered and diluted to 90 % (the test item was not completely solved at the end of the stirring time). The measurement of thesurface tension with the test itemwas carried out at 20 ±0.5°C.

 

Measurement

1

2

3

4

5

6

Time (s)

26

86

147

208

268

329

s(mN/m)

60.30

60.29

60.26

60.27

60.10

60.10

Mean value: sigma = 60.22 mN/m (corrected by Zuidema and Waters)

Due to the fact that the surface tension is higher than 60 mN/m, the test item has no surface-active properties.

Applicant's summary and conclusion

Conclusions:
The surface tension of the aqueous solution at 20 °C is sigma = 60.2 mN/m. The test item has no surface-active properties.
Executive summary:

Mean value: sigma = 60.22 mN/m (corrected by Zuidema and Waters)

Due to the fact that the surface tension is higher than 60 mN/m, the test item has no surface-active properties.