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Physical & Chemical properties

Surface tension

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Reference
Endpoint:
surface tension
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2017-04-27 (experimental phase)
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to
Guideline:
OECD Guideline 115 (Surface Tension of Aqueous Solutions)
Version / remarks:
OECD Guideline 115 dated 27. July 1995 “Surface tension of aqueous solutions“
Deviations:
no
Qualifier:
according to
Guideline:
EU Method A.5 (Surface Tension)
Version / remarks:
EU-Method A.5 “Surface Tension“ dated 30. May 2008 published on 31 May 2008
Deviations:
no
GLP compliance:
yes (incl. certificate)
Type of method:
plate method
Specific details on test material used for the study:
SOURCE OF TEST MATERIAL
- Source and lot/batch No.of test material: sponsor

STABILITY AND STORAGE CONDITIONS OF TEST MATERIAL
- Storage condition of test material: The test item was stored in a closed vessel at room temperature (17.2 – 22.5°C).
Key result
Surface tension:
>= 72.33 - <= 73.06 mN/m
Temp.:
20 °C
Conc.:
1 g/L
Remarks on result:
other: not surface active
Conclusions:
The study was performed according to OECD TG 115 under GLP on the substance to be registered itself, validity criteria were met, the test procedure is well documented and therefore reliability of Klimisch 1 has been assigned. During the specified period of time, no significant changes in the surface tension were detected. Values ranging from 72.33 mN/m to 73.06 mN/m were recorded showing no significant variations, All measured values lay clearly above the threshold for surface tension which is stated in the guidelines. Therefore, the result of the test is considered valid and the test item 1-(2-hydroxy-3-sulphonatopropyl)pyridinium (PPSOH) is classified as “not surface active” in a concentration of 1.00 g/L.
Executive summary:

The surface tension of an aqueous solution of 1-(2-hydroxy-3-sulphonatopropyl)pyridinium (PPSOH) was determined according to OECD 115 resp. EU A.5 as 72.64 ± 0.10 mN/m at 19.9 °C. One measurement was performed for verification (after 61 minutes). No significant changes and thus no significant dependence on time was observed.

As these values were higher than 60 mN/m, 1-(2-hydroxy-3-sulphonatopropyl)pyridinium (PPSOH) was classified as not surface active. The surface tension of the negative control lay within the accepted range.

Description of key information

Surface tension: 72.64 ± 0.10 mN/m at 19.9 °C, 1 g/l solution in deionised water, not surface active (plate method, OECD 115, GLP)

Key value for chemical safety assessment

Surface tension:
72.64
in mN/m at 20°C and concentration in mg/L:
1 000

Additional information