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EC number: 911-616-2 | CAS number: -
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:
- comparable to guideline study with acceptable restrictions
- Remarks:
- Limited information on test procedures was available. Please see remarks below.
- Qualifier:
- equivalent or similar to guideline
- Guideline:
- EU Method A.5 (Surface Tension)
- Deviations:
- not specified
- Principles of method if other than guideline:
- The surface tension was measured with the du Nouy tensiometer.
- GLP compliance:
- no
- Type of method:
- ring method
- Surface tension:
- 40.4 mN/m
- Temp.:
- 25 °C
- Conc.:
- 0.1 vol%
- Endpoint:
- surface tension
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- comparable to guideline study with acceptable restrictions
- Remarks:
- Limited information on test procedures was available. Please see remarks below.
- Qualifier:
- equivalent or similar to guideline
- Guideline:
- EU Method A.5 (Surface Tension)
- Deviations:
- not specified
- Principles of method if other than guideline:
- The surface tension was measured with the du Nouy tensiometer.
- GLP compliance:
- no
- Type of method:
- ring method
- Surface tension:
- 39 mN/m
- Temp.:
- 25 °C
- Conc.:
- 0.2 vol%
- Endpoint:
- surface tension
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- comparable to guideline study with acceptable restrictions
- Remarks:
- The test substance was identified only by its molecular formula. Please see the remarks below.
- Qualifier:
- no guideline available
- Principles of method if other than guideline:
- The Wilhelmy plate method was used to measure surface tension.
- GLP compliance:
- no
- Type of method:
- plate method
- Surface tension:
- 36 mN/m
- Temp.:
- 25 °C
- Conc.:
- 0.1 vol%
- Endpoint:
- surface tension
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- comparable to guideline study with acceptable restrictions
- Remarks:
- Limited information on test procedures was available. Please see remarks below.
- Qualifier:
- equivalent or similar to guideline
- Guideline:
- EU Method A.5 (Surface Tension)
- Deviations:
- not specified
- Principles of method if other than guideline:
- The surface tension was measured with the du Nouy tensiometer.
- GLP compliance:
- no
- Type of method:
- ring method
- Surface tension:
- 39.7 mN/m
- Temp.:
- 25 °C
- Conc.:
- 0.1 vol%
- Endpoint:
- surface tension
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- comparable to guideline study with acceptable restrictions
- Remarks:
- Limited information on test procedures was available. Please see remarks below.
- Qualifier:
- equivalent or similar to guideline
- Guideline:
- EU Method A.5 (Surface Tension)
- Deviations:
- not specified
- Principles of method if other than guideline:
- The surface tension was measured with the du Nouy tensiometer.
- GLP compliance:
- no
- Type of method:
- ring method
- Surface tension:
- 39 mN/m
- Temp.:
- 25 °C
- Conc.:
- 0.2 vol%
- Endpoint:
- surface tension
- Type of information:
- read-across from supporting substance (structural analogue or surrogate)
- Adequacy of study:
- key study
- Justification for type of information:
- The surface tension of the target substance, reaction mass of sodium methyl 2-sulphooctadecanoate and sodium 1-methoxy-1-oxohexadecane-2-sulphonate, was read-across from the two main components, C16MES and C18MES, as source substances. Based on the results of 3 studies for C16MES and 2 studies for C18MES, the target substance is considered to be surface active. It is concluded that the endpoint for the target substance is sufficiently covered by the available data of the source substances.
Please see read-across justification in section 13.2 - Reason / purpose for cross-reference:
- read-across source
- Reason / purpose for cross-reference:
- read-across source
- Reason / purpose for cross-reference:
- read-across source
- Reason / purpose for cross-reference:
- read-across source
- Reason / purpose for cross-reference:
- read-across source
- Surface tension:
- 40.4 mN/m
- Temp.:
- 25 °C
- Conc.:
- 0.1 vol%
- Remarks on result:
- other: Substance: C16MES (223-676-0)
- Surface tension:
- 39 mN/m
- Temp.:
- 25 °C
- Conc.:
- 0.2 vol%
- Remarks on result:
- other: Substance: C16MES (223-676-0)
- Surface tension:
- 36 mN/m
- Temp.:
- 25 °C
- Conc.:
- 0.1 vol%
- Remarks on result:
- other: Substance C16MES (223-676-0)
- Surface tension:
- 39.7 mN/m
- Temp.:
- 25 °C
- Conc.:
- 0.1 vol%
- Remarks on result:
- other: Substance: C18MES (223-770-1)
- Surface tension:
- 39 mN/m
- Temp.:
- 25 °C
- Conc.:
- 0.2 vol%
- Remarks on result:
- other: Substance: C18MES (223-770-1)
- Conclusions:
- The surface tension of the target substance, reaction mass of sodium methyl 2-sulphooctadecanoate and sodium 1-methoxy-1-oxohexadecane-2-sulphonate, was read-across from the two main components, C16MES and C18MES, as source substances. Based on the results of 3 studies for C16MES and 2 studies for C18MES, the target substance is considered to be surface active. It is concluded that the endpoint for the target substance is sufficiently covered by the available data of the source substances.
Referenceopen allclose all
Description of key information
3 publications for C16MES, with 2 different methods: results: 36 mN/m in 0.1%, 39 mN/m in 0.2% and 40.4 mN/m in 0.1 %
2 publications for C18MES, same method: results: 39.7 mN/m in 0.1 % and 39 mN/m in 0.2%
The weight of evidence shows that C16MES and C18MES are surface active. The reaction mass is therefore also considered surface active.
Key value for chemical safety assessment
Additional information
The results stated in each publication for both C16MES and C18MES are very similar. They were all determined at concentrations equal to or above the upper limit of 1 g/L stated in OECD 115. All results, as expected, are below 60 mN/m which is the OECD cut-off value for surface-active materials. The test results were all based on determinations at 25 ºC. It is anticipated that at 20 ºC, the results will be in the same range and the resulting label as surface active material will not be altered.
Theoretically, there shouldn't be a big difference in results between C16MES and C18MES. This is also found in the test results.
It is therefore judged that the results of the published articles are reliable and can be used to cover the surface tension of the reaction mass.
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