Registration Dossier

Administrative data

Endpoint:
surface tension
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: The study was conducted in accordance with GLP. A full study report is available which includes a GLP compliance statement.

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
1998
Report Date:
1988

Materials and methods

Test guideline
Qualifier:
according to
Guideline:
EU Method A.5 (Surface Tension)
Version / remarks:
84/449/EEC
Deviations:
no
GLP compliance:
yes (incl. certificate)
Type of method:
OECD harmonised ring method

Test material

Reference
Name:
Unnamed
Type:
Constituent
Details on test material:
- Physical state: White powder
- Analytical purity: Not stated
- Lot/batch No.: C-7672
- Expiration date of the lot/batch: Not stated
- Stability under test conditions: Considered stable
- Storage condition of test material: Brown screw capped bottle at room temperature
- Other:

Results and discussion

Surface tension
Surface tension:
55.4 mN/m
Temp.:
22 °C
Conc.:
90 other: % saturated solution

Any other information on results incl. tables

Results

a)       Calibration

The literature value for the surface tension of water at 22oC = 72.4mN/m

The average measured surface tension of the blank water at 22oC = 72.6mN/m

Therefore,

Øb = 72.4 = 0.9972

72.6

b)       Test solution

The time between preparation of the test solution 1 was 15 minutes and for test solution 2, 72 minutes. The mean measured surface tension was 55.6mN/m

Test solution surface tension corrected for calibration factor:

= 55.6 mN/m x 0.9972

= 55.4 mN/m

Applicant's summary and conclusion

Conclusions:
The surface tension of the substance in a 90% saturated aqueous solution was 55.4 mN/m at 22C.
Executive summary:

The surface tenstion of a 90% saturated aqueous solution of test sample was measured using the OECD harmonised ring method. Following correction by a calibration factor, the force required to detach the platinum ring from the surface of a 90% saturated aqueous solution was deternmined to be 55.4 mN/m at a temperature of 22oC.