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:
15 June, 2012
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
test procedure in accordance with national standard methods
Qualifier:
according to guideline
Guideline:
other: DIN 53914 Determining the surface tension of surfactants
Deviations:
no
Qualifier:
according to guideline
Guideline:
other: ISO Standard 304:1985
Deviations:
no
GLP compliance:
yes
Type of method:
other: Du Nouy method
Key result
Surface tension:
33 mN/m
Temp.:
25 °C
Conc.:
1 g/L
Remarks on result:
other: The critical micelle concentration (CMC) was found to be 0.10 g/L at pH 7.0 and 25°C.
Conclusions:
Under the study conditions, the surface tension of the1 g/L solution of the test substance at 25°C was found to be 33 mN/m and the critical micelle concentration was found to be 0.10 g/L at pH 7.0
Executive summary:

A study was conducted to determine the surface tension of the test substance, C16-18 TMAC (72.78% active) using DIN 53914 Guideline. Critical micelle concentration was determined using an automated tensiometer (KSV Tensiometer Sigma 70) connected with a computer. The water used was distilled and deionised using a MilliQ® plus purifier from Millipore. The tensiometer was calibrated with distilled water (surface tension value (mAV) at 25°C = > 72 mN/m). Under the study conditions, the surface tension of the1 g/L solution of the test substance at 25°C was found to be 33 mN/m and the critical micelle concentration was found to be 0.10 g/L at pH 7.0 (Borjesson, 2012).

Description of key information

The surface tension of the test substance was determined using DIN 53914 Guideline (Börjesson J, 2012). 

Key value for chemical safety assessment

Surface tension:
33
in mN/m at 20°C and concentration in mg/L:
1 000

Additional information