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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Short-term toxicity to fish

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Administrative data

Link to relevant study record(s)

Description of key information

Methacrylaldehyde is expected to be acutely very toxic to fish.

Key value for chemical safety assessment

Additional information

Since no test data on the acute toxicity of methacrylaldehyde (CAS 78-85-3) to fish are available a conclusion by analogy approach to acrylaldehyde (CAS 107-02-8) has been applied. In a semi-static study equivalent or similar to OECD 203 using Pimephales promelas as test species a LC50 (96 h) of 19.5 µg/L was determined.