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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Hydrolysis

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Administrative data

Link to relevant study record(s)

Description of key information

According to structural properties, hydrolysis is not expected

Key value for chemical safety assessment

Additional information

Styrene contains no hydrolysable groups (Howard et al., 1991). In addition, in column 2 of REACH Annex VIII, the hydrolysis study does not need to be conducted if the substance is readily biodegradable. Styrene is readily biodegradable. Therefore, hydrolysis testing is not required.