Registration Dossier
Registration Dossier
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EC number: 231-391-8 | CAS number: 7529-22-8
Endpoint summary
Administrative data
Description of key information
The substance NMMO is not readily biodegradable. The experiments performed by Meister and Wechsler (1998) indicate that NMMO is inherently biodegradable (not fulfilling specific criteria) in adapted but not unadapted sludge. NMMO was also demonstrated to be ultimately biodegradable, i.e., no persistent breakdown products are formed under these conditions. NMMO is degraded to NMM, NMM is demethylated to morpholine (rate-limiting), and morpholine then undergoes ring cleavage and further, ultimate biodegradation (Meister and Wechsler, 1998).
Additional information
According to REACH Annex XI 9.2 column 2, further testing of biotic degradation is not required if the chemical hazard assessment does not indicate the need. As the chemical hazard assessment for NMMO did not identify risks for the environment, further degradation testing was not performed.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
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