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Physical & Chemical properties

Surface tension

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Description of key information

At 90% of the saturated solution the surface tension of streams in this category is in the range 71.0 mN/m to 72.0 mN/m at 20°C. The streams are not surface active.

Key value for chemical safety assessment

Additional information

Proprietary studies were available from GKA Competence Centre Analytics (2008a, 2008b) for the streams 68477-39-4 (surface tension 71.6mN/m at 20ºC (90% saturation concentration)) and 68467-55-1 (surface tension 72.0 mN/m at 20ºC (90% saturation concentration)). These studies were in accordance with a standard guideline and are considered reliable for assessment. For the case of the stream 68467-55-1 the substance tested contained ca. 1% benzene which results in the substance not meeting the category chemical justification criteria. However, the amount of benzene is small and will not invalidate the result of this physical chemical endpoint. The data from these studies will be read across to other members of the category.