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EC number: 939-237-8
CAS number: -
The surface tension of undecanol, branched and linear 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.
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.
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