Registration Dossier

Administrative data

Endpoint:
surface tension
Type of information:
experimental study
Adequacy of study:
key study
Study period:
September 24, 1992 - September 25, 1992
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: see 'Remark'
Remarks:
This study has been performed according to OECD 115 (1981), EU Method A.5 (1984), proposed updated version of EU Method A.5 (November 1989) and according to GLP principles. Limited information available to verify the composition of the used test substance.

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
1992
Report Date:
1992

Materials and methods

Test guidelineopen allclose all
Qualifier:
according to
Guideline:
OECD Guideline 115 (Surface Tension of Aqueous Solutions)
Version / remarks:
(1981)
Deviations:
no
Qualifier:
according to
Guideline:
EU Method A.5 (Surface Tension)
Version / remarks:
(1984)
Deviations:
no
Qualifier:
according to
Guideline:
other: proposed updated version of EU Method A.5 (November 1989)
Deviations:
no
GLP compliance:
yes
Type of method:
ring method

Test material

Reference
Name:
Unnamed
Type:
Constituent
Details on test material:
- Name of test material (as cited in study report): KY-MA
- Physical state: Light yellow solid
- Storage condition of test material: At room temperature in the dark

Results and discussion

Surface tension
Surface tension:
73.8 mN/m
Temp.:
20 °C
Remarks on result:
other: The saturated solution was clear and was obtained by centrifugation and by removal of floating particles by suction.

Any other information on results incl. tables

Calibration

The mean surface tension was determined to be 73.7 mN/m (measured at 19.8 - 19.7 degrees Celsius). The calibration factor was therefore 72.63/73.7 = 0.985

Results individual measurements

Measurement

Time expired [min]

Surface tension [mN/m]

measured

mean

Mean corrected for calibration

Mean corrected for calibration and using Harkins and Jordan

1

26

75.0

74.9

73.8

73.8

2

27

75.0

3

28

74.8

4

29

74.7

5

30

74.8

 

Applicant's summary and conclusion

Conclusions:
The ring method was applied for the determination of the surface tension of the substance, in accordance with OECD 115 (1981), EU Method A.5 (1984), proposed updated version of EU Method A.5 (November 1989) and according to GLP principles. The surface tension of a saturated solution of the substance at 20°C was 73.8 mN/m. As this value is well below the cut-off value for surface active substances (60 mN/m), the substance is considered to be not surface active.