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Physical & Chemical properties

Surface tension

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Description of key information

The surface tension in water is 33.9 mN/m at 25 °C and 67.9 mN/m at 20 °C, according to EU method A.5.

Key value for chemical safety assessment

Surface tension:
67.9

Additional information

The surface tension at 20 °C and 25 °C of a solution of the substance in demineralized water with a concentration corresponding to 90 % of the saturation solubility, was determined by the plate method using a tensiometer. The following result of 67.9 mN/m at 20 °C and 33.9 mN/m at 25 °C was received. For verification of the measured values demineralized water is also measured. With a correspondence of the measured value σ (20 °C) = 72.6 mN/m, to the theoretical value σ (20 °C) = 72.75 mN/m, cited in literature, the determination of the surface tension is considered as valid.