Registration Dossier
Registration Dossier
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EC number: 931-330-1 | CAS number: 69227-24-3
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:
- May 4, 2010 to May 6, 2010
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: Study was conducted according to OECD guideline and in compliance with GLP
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 115 (Surface Tension of Aqueous Solutions)
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- OECD harmonised ring method
- Surface tension:
- 38.5 mN/m
- Temp.:
- 20 °C
- Conc.:
- 12.2 mg/L
- Conclusions:
- The surface tension of amides, C18-18 and C18 unsatd., N-(hydroxyethyl) was 38.5 mN/m at 12.2 mg/L concentration according to OECD Guideline 115.
- Executive summary:
An OECD Guideline 115 study was conducted to determine the surface tension of amides, C18-18 and C18 unsatd., N-(hydroxyethyl).
The critical micelle concentration (CMC) of the test material was determined to be 13.6 mg/L. This value was used as an approximation of the water solubility limit. At 90% of the above estimated solubility limit (12.2 mg/l), using the determined surface tension concentration dependence, the surface tension was calculated to be 38.5 mN/m.
Reference
The CMC of the test material was found to be 13.6 mg/L and at 90% of this concentration, i.e., 12.2 mg/L, the surface tension was determined to be 38.5 mN/m.
An analysis of variance test revealed that there is no statistically significant difference (at P = 0.484) of the mean values between pure water and water containing 0.1 – 0.5 mL/L of methanol. It can therefore be assumed that a methanol content within this range has no impact on the surface tension of the test solutions.
Description of key information
The surface tension was determined according to OECD Guideline 115 (Lewandowska, 2010).
Key value for chemical safety assessment
- Surface tension:
- 38.5
- in mN/m at 20°C and concentration in mg/L:
- 12.5
Additional information
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