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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Environmental fate & pathways

Bioaccumulation: aquatic / sediment

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Administrative data

Link to relevant study record(s)

Description of key information

The highest BCF for edible portions of Salmo gairdneri was 25.9.

Key value for chemical safety assessment

BCF (aquatic species):
25.9 dimensionless

Additional information

A bioaccumulation in fish study is available for one of the streams in this category. Walsh et al (1977) conducted a 56 day flow through test, with analytical confirmation of exposure concentrations, to determine the bioaccumulation of xylenes by Salmo gairdneri. After 56 days the concentration of xylene in the edible portions of the fish was measured. By comparing the concentrations measured in the edible portions with the exposure concentrations, we have calculated BCF from the data reported by the authors. The highest BCF was 25.9. There was no significant difference in the concentrations measured in the edible portions of the fish after 1 or 56 days exposure, nor at the different exposure concentrations. We can therefore conclude that the bioaccumulation is initially rapid but that after this time the amounts bioaccumulated do not increase with exposure duration.

The Bioconcentration Factor for this substance has been estimated using the EPISUITE program and based on methodologies developed by Arnot-Gobas et al. (2006). The estimated BCF based on the Arnot-Gobas method (upper trophic) for this substance is 110.7 L/kg.