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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Endpoint summary

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Administrative data

Description of key information

The value for log n-octanol-water partition coefficient (log Kow), which is considered a good predictor for bioconcentration, is approximately three. Since an experimental study showing low bioaccumulation of styrene is considered not valid, the BCF was predicted using log Kow and the equation from the TGD, giving a value of 74. A QSAR was performed as well using the BCF baseline. The BCF was predicted to be between 1.714 and 2.016 l/kg. These values suggests that the compound probably does not accumulate appreciably in aquatic organisms. Moreover, because styrene is probably metabolized and excreted, bioaccumulation is unlikely. This is also supported by the fact that analogue substances, such as toluene, xylene and ethylbenzene do not accumulate to any great degree in aquatic organisms.

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