1,1'-(4-methyl-1,3-phenylene)bis-1H-pyrrole-2,5-dione

Surface tension

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

Guideline:

OECD Guideline 115 (Surface Tension of Aqueous Solutions)

Version / remarks:

adopted 1995

Deviations:

no

Qualifier:

according to guideline

Guideline:

EU Method A.5 (Surface Tension)

Version / remarks:

1992

Deviations:

no

GLP compliance:

yes (incl. QA statement)

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.