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Environmental fate & pathways

Bioaccumulation: aquatic / sediment

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Description of key information

Sulfonic acids, C14-16 (even numbered)-alkane hydroxy and C14-16 (even numbered)-alkene, sodium salts has a low potential for bioaccumulation indicated by an experimental log Pow of -1.3.

Key value for chemical safety assessment

BCF (aquatic species):
70.8 L/kg ww

Additional information

A bioconcentration test with aquatic organisms is not available for the test substance. Based on the experimental log Kowof -1.3, the test substance has a low bioaccumulation potential. This assumption is confirmed by the SIDS Initial Assessment Report for Alkyl Sulfates, Alkane Sulfonates, Alpha-Olefin Sulfonates (SIAM 25) (OECD, 2007). The document summarises the data for the category consisting of the mentioned groups and concluded that the bioconcentration tendency for α-olefin sulfonates (AOS) is low (BCF < 100) for chain lengths up to C16 and due to similar chemistry and physical properties, bioaccumulation potential of AOS is expected to be similar to that of the Alkyl Sulfates. Hence, bioconcentration factors for AOS are expected to be similar to those of the Alkyl Sulfates. Experimental data from a fish study (Wakabayashi et al., 1980) show that the BCF of Alkyl Sulfatesin aquatic species is < 100. Both BCF and depuration time (the latter at least for 12 and 14 carbons in the alkyl chain) indicate that the substances are not bioaccumulative up to 16 carbons in the alkyl chain (SIDS, 2007).

Taking the available information into account, a test proposal for a further aquatic BCF study is not deemed necessary.