Registration Dossier
Registration Dossier
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EC number: 201-283-5 | CAS number: 80-48-8
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:
- 21 September 2017
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.5 (Surface Tension)
- Version / remarks:
- Commission Regulation (EC) No 440/2008 of 30 May 2008 laying down test methods pursuant to Regulation (EC) No 1907/2006 of the European Parliament and of the Council on the Registration, Evaluation, Authorisation and Restriction of Chemicals (REACH), Method A.5. “Surface Tension”, Official Journal of the European Union L 142 of 31 May 2008
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 115 (Surface Tension of Aqueous Solutions)
- Version / remarks:
- Organization for Economic Co-operation and Development (OECD) Guidelines for Testing of Chemicals, Guideline No. 115, ”Surface Tension of Aqueous Solutions”, adopted 27 July 1995
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- ring method
- Specific details on test material used for the study:
- No further details specified in the study report.
- Key result
- Surface tension:
- 64.2 mN/m
- Temp.:
- 21 °C
- Conc.:
- 0.793 g/L
- Conclusions:
- The determination of the surface tension was carried out on the test item, with the use of a Krüss K11 Tensiometer by the ring method. The value was found to be 64.2 mN/m
at 21°C ± 0.5°C.
As the surface tension value was higher than 60 mN/m, PTSM is classified as non-surface active. - Executive summary:
The objective of the study was to evaluate the surface tension of PTSM by the ring method.
The method is based on the measurement of the force, which is necessary to exert vertically on a ring, in contact with the surface of the liquid, in order to separate it from the surface.
The determination of the surface tension was carried out on the test item, with the use of a Krüss K11 Tensiometer by the ring method. The value was found to be 64.2 mN/m at 21°C ± 0.5°C.
As the surface tension value was higher than 60 mN/m, PTSM is classified as non-surface active.
Reference
Measured surface tension values and equilibrium times
Surface tension (mN/m) |
Time (sec) |
63.25 63.23 63.22 63.21 63.19 |
344 372 399 427 456 |
The surface tension of the test item aqueous solution read on the instrument was 63.2 mN/m at 21 °C ± 0.5 °C using the ring method representing the mean of five separate measurements. The measured values were corrected with Harkins-Jordan correction factor.
The measured surface tension was multiplied by Φb resulting in a corrected surface tension of 64.2 mN/m.
As the surface tension value was higher than 60 mN/m, PTSM is classified as non-surface active.
Description of key information
The value was found to be 64.2 mN/m at 21°C ± 0.5°C.
Key value for chemical safety assessment
- Surface tension:
- 64.2
- in mN/m at 20°C and concentration in mg/L:
- 793
Additional information
The determination of the surface tension was carried out on the test item, with the use of a Krüss K11 Tensiometer by the ring method. The value was found to be 64.2 mN/m at 21°C ± 0.5°C.
As the surface tension value was higher than 60 mN/m, PTSM is classified as non-surface active.
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