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Physical & Chemical properties

Surface tension

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Description of key information

The surface tension of  Alcohols, C12-13, branched and linear is not quantified. A value in the range ca. 30 mN/m to ca. 66.5 mN/m at ca. 90% saturated aqueous solution is estimated by read-across from undecan-1-ol and (Z)-octadec-9-enol . 

Key value for chemical safety assessment

Additional information

A preliminary assessment by calculated Hydrophilic Lipophilic Balance suggests that no surface tension lowering property would be expected on the basis of structure alone.

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 structural analogue n-octanol, which is considerably more soluble in water than the constituents of Alcohols, C12-13, 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.

In some cases the CAS and chemical identity stated refer to SDA nomenclature for this substance. in REACH substance identification it is necessary to be more specific as to the chain lengths present. Full details may be found in the CSR.

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