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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Additional information

Data availability


For EMA acute as well as chronic studies of sufficient reliability are available for all three trophic levels, as well as reliable microbial toxicity data.



The aquatic toxicity of ethyl methacrylate was investigated on all three trophic levels using acute as well as long-term toxicity tests. The results showed that the test substance is of low toxicity to fish (LC50 100 mg/L) and algae and harmful to aquatic invertebrates (EC50 > 66 mg/L). In the long-term toxicity tests, invertebrate toxicity in a long-term Daphnia magna test was the most sensitive endpoint (NOEC 18 mg/L). The microbial EC50 was determined to be 1000 -1800 mg/L based on data from an activated sludge protocol.