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Diss Factsheets

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:
1 October 2018 to 14 March 2019
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Qualifier:
according to guideline
Guideline:
OECD Guideline 115 (Surface Tension of Aqueous Solutions)
Deviations:
no
Qualifier:
according to guideline
Guideline:
EU Method A.5 (Surface Tension)
Deviations:
no
GLP compliance:
yes
Type of method:
ring method
Specific details on test material used for the study:
Purity: 100% (UVCB)
Appearance/Physical state: Solid, white pastille
Storage: Room temperature in the dark
Key result
Surface tension:
ca. 54.2 mN/m
Temp.:
20 °C
Conc.:
90 vol%

On removal from the 20 deg.C equilibration, both solutions were noted to be a translucent, off white liquid and undissolved test item was noted on the sides of the flasks. The solutions were filtered througha 0.45 µm and 0.2 µm series of membrane filters and inspected. Both solutions were noted to be clear, colorless liquids. However, both solutions presented a distinct Tyndall beam. The clear solutions were diluted to 90%.

According to criteria stated in EC Method A.5, substances showing a surface tension lower than 60 mN/m under the conditions of this method should be regarded as being surface-active.

Conclusions:
In a study conducted according to OECD 115, using the ring method, the surface tension of duplicate, 90 % saturated solutions of test item in water has been determined to be 54.2 mN/m at 20.0 ± 0.5 °C.

The test item was considered to be surface-active.
Executive summary:

The surface tension of the test item was determined to be 54.2 mN/m (mean of duplicate, 90% saturated solutions) at 20.0 +/- 0.5 deg. C, using a ring method, designed to be compatible with Method A.5 Surface Tension of Commission Regulation (EC) No 440/2008 of 30 May 2008, OECD Guidelines for Testing of Chemicals No. 115, 27 July 1995.

The test item was considered to be surface-active.

Description of key information

In a study conducted according to OECD 115, using the ring method, the surface tension of duplicate, 90 % saturated solutions of test item in water has been determined to be 54.2 mN/m at 20.0 ± 0.5 °C.  

The test item was considered to be surface-active.

Key value for chemical safety assessment

Surface tension:
54.2

Additional information