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Physical & Chemical properties

Surface tension

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Reference
Endpoint:
surface tension
Type of information:
experimental study
Adequacy of study:
key study
Study period:
February 16, 2012
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
test procedure in accordance with national standard methods
Reference:
Composition 1
Qualifier:
according to
Guideline:
other: DIN 53914 Determining the surface tension of surfactants
Deviations:
no
Qualifier:
according to
Guideline:
other: ISO 304:1985
Deviations:
no
GLP compliance:
yes
Type of method:
ring method
Test material information:
Composition 1
Specific details on test material used for the study:
Batch no.: DEG4147039
Purity: 99.2% (w/w)
Appearance: white solid (powder)
Key result
Surface tension:
38 mN/m
Temp.:
25 °C
Conc.:
1 g/L
Remarks on result:
other: The critical micelle concentration of test substance was found to be 49 mg/L at pH 7.0 and 25°C.
Conclusions:
Under the test conditions, the surface tension of 1 g/L solution of the test substance was found to be 38 mN/m at 25°C and the critical micelle concentration was 49 mg/L at pH 7.0.
Executive summary:

A study was conducted to determine the surface tension of the test substance according to DIN 53914 (Determining the surface tension of surfactants) and ISO 304:1985, in compliance with GLP. The ring method was used in this experiment. Critical micelle concentration was determined using an automated tensiometer (KSV Tensiometer Sigma 70) connected with a computer. The test water 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 test conditions, the surface tension of 1 g/L solution of the test substance was found to be 38 mN/m at 25°C and the critical micelle concentration was 49 mg/L at pH 7.0 (Börjesson, 2012).

Description of key information

The surface tension was determined according to DIN 53914 and ISO 304:1985 (ring method) (Börjesson, 2012)

Key value for chemical safety assessment

Surface tension:
38
in mN/m at 20°C and concentration in mg/L:
1 000

Additional information