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Physical & Chemical properties

Surface tension

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Description of key information

A study conducted on the reference substance (White & Mullee, 2007) concluded that the surface tension of a 1.00 g/L solution to be 70.6 mN/m at 22.4 ± 0.5°C. The test material is considered not to be a surface-active material.

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Additional information

The determination was carried out using a White Electrical Institute interfacial tension balance and a procedure based on the ISO 304 ring method. With the exception of the following deviation, the experimental procedure used complied with that specified in Method A5 of Commission Directive 92/69/EEC (which constitutes Annex V of Council Directive 67/548/EEC).

1) 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.

The surface tension of a 1.00 g/L solution of test material has been determined to be 70.6 mN/m at 22.4 ± 0.5°C. The test material is considered not to be a surface-active material.