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Physical & Chemical properties

Surface tension

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Description of key information

The surface tension of Reaction mass of 2-butylheptan-1-ol and 2-ethylnonan-1-ol and 2-methyldecan-1-ol and 2-propyloctan-1-ol is read across from a measured value for undecan-1-ol. At 90% saturated aqueous solution the result is 31.8 mN/m based on a reliable and well-reported published study.

Key value for chemical safety assessment

Additional information

A preliminary assessment by calculated Hydrophilic Lipophilic Balance suggests that no surface tension lowering property is expected.

The main purpose of determining surface tension is to assess whether a substance is a surfactant and not able to have a log Kow test 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 measurement, for a highly pure sample, is at ca. 90% aqueous solution based on the limit of solubility of highly pure alcohols as reported in the literature.