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Physical & Chemical properties

Surface tension

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Description of key information

The surface tension of Alcohols, C9-11 (odd numbered), branched and linear is read across from the measured values for the pure linear constituents. At 90% saturated aqueous solution the constituents have measured surface tension values of approximately 18-32 mN/m based on a reliable and well-reported published study.

Key value for chemical safety assessment

Additional information

The main purpose of determining surface tension is to assess whether a substance is a surfactant and not able to have a log Kow done. The close structural analogue n-octanol is regularly used with water in the classic two-phase partitioning experiment (e.g. OECD Guideline 107). Octanol and all alcohols do phase separate which suggests that emulsification is not so strong as to create issues with measurement of partitioning or other fate or effects studies. The reported measurements, for highly pure samples of nonan-1-ol and undecan-1-ol are at ca. 90% aqueous solution based on the limit of solubility of highly pure alcohols as reported in the literature.