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Ecotoxicological information

Short-term toxicity to fish

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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.