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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Additional information


The ready biodegradability of a structural analogue, tetrahydromethylphthalic anhydride (MTHPA), was studied in a Modified MITI Test according to OECD test methods. The substance was exposed to activated sludge for 28 days. MTHPA changed to the dissociated substance, which was stable under the chosen conditions. As a result, the substance is considered to be not readily biodegradable.