Registration Dossier

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Additional information

The bioaccumulation potential of LAS has been evaluated and found to be low based on aquatic data in fish. BCF values ranged from between 2 and < 1000 L/kg, with a BCF value of 99 for the 2-phenyl isomer of the C12 homologue. In vitro study demonstrate that low bioaccumulation is due to rapid biotransformation. BCF values for mixtures can be calculated based on the weight fraction of each homologue. The calculated BCF was 87 L/kg for a standard mixture typical of LAS in European detergent formulations (average alkyl chain length = 11.6). The calculated BCF value was 22 L/kg for a representative environmental sample (filtered Mississippi river water, average alkyl chain length = C10.8), demonstrating that BCF is decreased by environmental processes such as biodegradation and absorption, which reduce aquatic concentrations.

No specific data are available for bioaccumulation in terrestrial organisms, but based on the low bioaccumulation potential in aquatic organisms, bioaccumulation is not expected.