Registration Dossier
Registration Dossier
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EC number: 269-616-7 | CAS number: 68307-94-8
Surface tension
Administrative data
Link to relevant study record(s)
Description of key information
The surface tension of a 90% saturated aqueous solution of test item has been determined to be 31.4 mN/m at 22.3 ± 0.5°C. The test item was considered to be surface-active.
Key value for chemical safety assessment
- Surface tension:
- 31.4
Additional information
Method
The determination was carried out using a White Electrical Institute Co. Ltd. torsion balance for surface and interfacial tension measurements and a procedure based on the ISO 304 ring method. With the exception of the following deviation, the experimental procedure used was designed to be compatible with that specified in Method A5 Surface Tension of Commission Regulation (EC) No 440/2008 of 30 May 2008 and Method 115 of the OECD Guidelines for the Testing of Chemicals, 27 July 1995.
- The surface tension result was not corrected using the Harkins-Jordan correction table as the correction is not applicable to the apparatus used. Once calibrated, the balance and ring assembly used in this test give a direct reading for surface tension that is within the required accuracy (± 0.5 mN/m); this is as a result of the reduced ring dimensions.
This deviation has been considered not to have affected the integrity of the study.
Discussion
It is evident from the information obtained in the hydrolysis test and data relating to the pH of the test item in water that negligible hydrolysis of the sample solution occurred during the course of the surface tension test.
Conclusion
The surface tension of a 90% saturated aqueous solution of test item has been determined to be 31.4 mN/m at 22.3 ± 0.5°C. The test item was considered to be surface-active.
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