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EC number: 931-338-5 | CAS number: 90622-77-8
Surface tension
Administrative data
Link to relevant study record(s)
- Endpoint:
- surface tension
- Type of information:
- read-across based on grouping of substances (category approach)
- Adequacy of study:
- key study
- Study period:
- May 4, 2010 to May 6, 2010
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- guideline study
- Remarks:
- KL2 due to RA
- Justification for type of information:
- Refer to section 13 of IUCLID for details on the category justification.
- 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 the read across substance amides, C8-18 and C18-unsatd., N-(hydroxyethyl).
The critical micelle concentration (CMC) of the test material was determined to be 13.6 mg/l.. This value of 13.6 mg/l 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:
- 12.2
Additional information
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