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Environmental fate & pathways

Bioaccumulation: aquatic / sediment

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Description of key information

Based on the value of the logPow, the substance is expected to show some bioaccumulation. 

Key value for chemical safety assessment

Additional information

Calculations based on the logKow of 5 with EUSES gave a BCF of 3.55E03. This outcome is expected to be an overestimation of bioaccumulative properties.Calculations with the epiwin model gave much lower values (dimer modelled with logPow 5.0).

The substance is a UVCB. A field study has indicated that relevant individual resin acids as present in crude tall oil oxidised do not bioaccumulate significantly in fish and bioaccumulation is considerably less than that predicted by Log Pow (Nimi, A J, Lee, H B 'Free and conjugated concentrations of nine resin acids in the rainbow trout (Onchorynchus mykiss) following waterborne exposure' Environmental Toxicology and Chemistry 11, 1403-1407, 1992). For the linear acids present in crude tall oil oxidised, uptake and concomitant metabolism is expected following the "normal" fatty acid metabolic pathway.

In addition conducting an experimental study on the whole UVCB would not be technically feasible because of the complexity of the measurements required.