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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Dimethyl phosphonate is not readily biodegradable. Studies on biodegradation revealed a DOC of 50% and a BOD of 48% after 28 d (Bayer AG, 1992; MITI, 1992). The majority of carbon determined after 28 d should be based on monomethyl phosphonate which is hydrolysed slower than dimethyl phosphonate and is more stable in aqueous solutions. Hydrolysis of dimethyl phosphonate and monomethyl phosphonate is the determining factor for the speed at which biodegradation of dimethyl phosphonate occurs.