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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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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Link to relevant study record(s)

Description of key information

Alpha-methylstyrene proved to be stable towards hydrolysis at pH 4, 7, and 9 and 25°C. 

Key value for chemical safety assessment

Additional information

In a study conducted by CITI (Japan) according to OECD Guideline 111 (Hydrolysis as a Function of pH), alpha-methylstyrene proved to be stable at pH 4, 7, and 9 at 25°C. The original reference is not available, however, data were peer-reviewed during the OECD/SIDS procedure and therefore regarded as valid.