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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Physical & Chemical properties

Surface tension

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Description of key information

The surface tension of Alcohols, C7-9-linear and branched 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 ca. 18-35 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 hexan-1-ol, octan-1-ol and nonan-1-ol are at ca. 90% aqueous solution based on the limit of solubility of highly pure alcohols as reported in the literature.

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.