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Environmental fate & pathways

Bioaccumulation: aquatic / sediment

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Description of key information

The BCF of LAS-Na is between 2 and 1000 L/kg, with BCFs increasing with increasing alkyl chain lengths and with BCFs increasing the closer the p-sulfophenyl moiety is positioned to the terminal carbon of the alkyl chain.
The BCF of TEA is <3.9

Key value for chemical safety assessment

BCF (aquatic species):
500 L/kg ww

Additional information

No bioaccumulation study is available for LAS-TEA. The endpoint of bioaccumulation was addressed with data for LAS-Na and TEA (see read-across statement).

The experimentally determined BCF of LAS-Na and TEA are 2 - 1000 L/kg (depending on alkyl chain length) and 3.9, respectively. In the bioaccumulation study with LAS-Na it was shown that BCFs increased with the length of the alkyl chain for C10 to C13.The BCF of LAS-TEA will be well below 1000 L/kg, since the C-chain length of the constituents of LAS-TEA is more or less equally distributed over the C10, C11, C12 and C13 constituents, with the C11 and C12 components most abundant. Additonally it was shown in the article by Tolls et al. (1997) that the BCF decreases with the p-sulfophenyl moiety being positioned further away from the terminal carbon of the alkyl chain, which supports a lower BCF of LAS-TEA as well, based on its composition with the p-sulfophenyl moiety on the C4 position mainly. In fact, only for C13-LAS with the p-sulfophenyl moiety positioned at the C2 position a BCF higher than 500 L/kg was observed, so the BCF for LAS-TEA will be below 500 L/kg.

LAS-TEA further has a log Kow of 1.5, indicating low potential for bioaccumulation and environmental concentrations are reduced by environmental processes such as biodegradation and absorption.

It can be concluded that the bioconcentration potential of LAS-TEA is low.