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:
April, 2007
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
OECD Guideline 115 (Surface Tension of Aqueous Solutions)
Deviations:
no
Qualifier:
according to
Guideline:
EU Method A.5 (Surface Tension)
Version / remarks:
Cited as Directive 92/69/EEC, A.5
Deviations:
no
GLP compliance:
yes (incl. certificate)
Type of method:
ring method
Specific details on test material used for the study:
C12-16 BKC with Purity 94.4%
Purified active substance obtained via lyophilisation of aqueous solution (batch 667H3002)
Key result
Surface tension:
28.27 mN/m
Temp.:
19.7 °C
Conc.:
1 g/L

CMC:  0.50 g/L for C14-chain length and 1.0 g/L for C12 -chain length

Conclusions:
Under the study conditions, the surface tension of the test substance was determined to be 28.27 ± 0.05 mN/m (ring method)
Executive summary:

A study was conducted to determine the surface tension of the test substance, according to OECD Guideline 115 and EU Method A.5 (ring method). Additionally the critical micelle concentration (CMC) was determined. The determination of surface tension of an aqueous solution of 1 g/L was carried out at a temperature range of 19.7 to 19.8°C. The critical micelle concentration (CMC) was determined by measuring the surface tension of the test substance at different concentrations. 1 g/L (total volume 100 mL), prepared in double distilled water, was used to determine the surface tension in 10 measurements. Different concentrations of the test substance in the range of 0.02 to 5 g/L (total volume 100 mL), prepared in bi-distilled water, were applied for the determination of the critical micelle concentration. The experiment was carried out at 20 ± 0.5°C. The CMC were determined to be 0.50 g/L for C14-chain length and 1.0 g/L for C12 -chain length. Under the study conditions, the surface tension of the test substance was determined to be 28.27 ± 0.05 mN/m (Schulze, 2007).

Description of key information

The surface tension (and the critical micelle concentration) was determined according to OECD Guideline 115 and EU Method A.5 (ring method) (Schulze, 2007)

Key value for chemical safety assessment

Surface tension:
28.27
in mN/m at 20°C and concentration in mg/L:
1 000

Additional information

CMC: 0.50 g/L for C14-chain length and 1.0 g/L for C12-chain length