Registration Dossier
Registration Dossier
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EC number: 221-361-2 | CAS number: 3077-27-8
Surface tension
Administrative data
Link to relevant study record(s)
- Endpoint:
- surface tension
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- guideline study with acceptable restrictions
- Reason / purpose for cross-reference:
- reference to same study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 115 (Surface Tension of Aqueous Solutions)
- Deviations:
- yes
- Remarks:
- Measurement performed on saturated solution.
- GLP compliance:
- no
- Type of method:
- ring method
- Surface tension:
- 2.5 mN/m
- Temp.:
- 23 °C
- Conc.:
- 6 mg/L
Reference
Sample |
Surface Tension |
water (ultrapure) |
72.0 mN/m |
MSSA in water (6 μg/ml) |
2 mN/m (1st reading) 3 mN/m (2nd reading) 2.5 ± 0.5 mN/m (mean) |
No change of surface tension was observable when the measurement was repeated after 10 min.
Description of key information
Surface tension = 2.5 mN/m at 23 °C, concentration in water ca. 6 mg/L (OECD Guideline 115, ring method)
Key value for chemical safety assessment
Additional information
The surface tension was measured using a saturated solution of the test item.
Considering that distilled water has a surface tension of 72.75 mN/m at 20 °C, substances showing a surface tension lower than 60 mN/m under the conditions of this method should be regarded as being surface-active materials. Considering the surface tension of 2.5 mN/m at 23 °C, determined for the test substance, it can be concluded that the test substance is not surface active.
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