Registration Dossier

Physical & Chemical properties

Surface tension

Currently viewing:

Administrative data

Link to relevant study record(s)

Reference
Endpoint:
surface tension
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2015-12-07 to 2016-03-04
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
OECD Guideline 115 (Surface Tension of Aqueous Solutions)
Version / remarks:
adopted 1995
Deviations:
no
Qualifier:
according to
Guideline:
EU Method A.5 (Surface Tension)
Version / remarks:
1992
Deviations:
no
GLP compliance:
yes (incl. certificate)
Type of method:
OECD harmonised ring method
Specific details on test material used for the study:
TREATMENT OF TEST MATERIAL PRIOR TO TESTING
- Treatment of test material prior to testing:
618 mg of the test item were weighed out into a 500 ml SCHOTT-flask and filled up with 400 ml double distilled water (conductivity: ≤ 2 µS/cm, ROTH). This mixture was stirred in the closed flask protected from light for approx. 24 1/4 h at ambient temperature to prepare a saturated solution. The saturated aqueous solution was stabilised and maintained for at least 30 minutes at 20 °C in a refrigerated circulator without stirring and then filtered through a paper filter (MN 615 1/4, Ø 150 mm, Ref: 531015, MACHEREY-NAGEL). Then, an adequate amount of this filtrate was transferred into a 200 ml measuring flask containing 20 ml double distilled water and filled up to the mark to prepare a 90% saturated solution.

- Final dilution of a dissolved solid, stock liquid or gel:
An adequate amount of filtrate was transferred into a 200 ml measuring flask containing 20 ml double distilled water and filled up to the mark to prepare a 90% saturated solution.

FORM AS APPLIED IN THE TEST (if different from that of starting material)
90 % saturated solution
Key result
Surface tension:
59.21 mN/m
Temp.:
20 °C
Conc.:
90 other: % in saturated solution
Conclusions:
In this OECD guideline compliant study a 90 % saturated solution of the test substance was prepared and the surface tension was determined with a tensiometer at 20°C to be 59.21 mN/m (standard deviation ± 0.05 mN/m). Considering that distilled water has a surface tension of 72.75 mN/m at 20 °C and 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

- OECD guideline study with 90 % saturated solution of the test substance, surface tension at 20°C: 59.21 mN/m (standard deviation ± 0.05 mN/m)

Key value for chemical safety assessment

Surface tension:
59.21
in mN/m at 20°C and concentration in mg/L:
618

Additional information

In the present OECD guideline compliant study a 90 % saturated solution of the test substance was prepared and the surface tension was determined with a tensiometer at 20°C to be 59.21 mN/m (standard deviation ± 0.05 mN/m).

Considering that distilled water has a surface tension of 72.75 mN/m at 20 °C and 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.