Registration Dossier

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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Administrative data

Description of key information

The hydrolysis product Methacrylic acid of methacrylic anhydride is readily biodegradable within 28 days fulfilling 10 d-window.

Additional information

There is no biodegradation study for methacrylic anhydride, but because of the short half-life in water (25.5 min at pH 7), which is much faster than biodegradation, the respective study for the hydrolysis product, methcrylic acid, is used for the assessment.

Methacrylic acid was degraded by 86 % after 28 days in an OECD 301D biodegradation screening test in water (Closed bottle test) and passed the ten day window. Therefore methacrylic anhydride is considered to be readily biodegradable as well as methacrylic acid.