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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Ecotoxicological information

Endpoint summary

Administrative data

Description of key information

Data from all three trophic levels indicate a lack of toxic effect at the maximum concentrations tested.  Therefore, trimethylamine N-oxide does not meet the classification criteria of EC 1272/2008 (as amended) for environmental hazards.

Trimethylamine N-oxide is not classified for environmental hazards.


Exposure assessment and risk characterisation are not required for the environment as no hazard has been identified for environmental health.

Additional information