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EC number: 203-929-1 | CAS number: 112-03-8
Surface tension
Administrative data
Link to relevant study record(s)
- 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
- Qualifier:
- according to guideline
- Guideline:
- other: DIN 53914 Determining the surface tension of surfactants
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- other: ISO 304:1985
- Deviations:
- no
- GLP compliance:
- yes
- Type of method:
- ring method
- 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 study 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, C18 TMAC (Purity: 99.2%) 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 study 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).
Reference
Description of key information
The surface tension of the test substance was determined using ring method according to DIN 53914 and ISO 340:1985 (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
(surface active)
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