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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

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Environmental fate & pathways

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Styrene can be readily degraded in water under aerobic conditions. A complete review on basics of microbial styrene degradation under aerobic and anaerobic conditions comprising identified pathways and usage of styrene-degradative consortia and styrene-catabolic enzymes is given by Dirk Tischler and Stefan Kaschabek


(S.N. Singh (ed.) 2012, Microbial Degradation of Xenobiotics, Environmental Science and Engineering, Chapter 3, p. 67 -99).


Rate of microbial mineralisation is rapid also in mineral soils and organic soils under aerobic conditions. Almost complete removal of styrene is achieved in industrial wastewater treatment plants as well as in municipal wastewater treatment plants after adaptation. Styrene degrades more slowly in groundwater than in surface waters. Fu and Alexander (1992) report that anaerobic environment cultures of bacteria have been shown to convert styrene to a series of aromatic, alicyclic and aliphatic products and these probably persist.

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