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Short-term toxicity to aquatic invertebrates

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Description of key information

Methacrylaldehyde is acutely very toxic to aquatic invertebrates.

Key value for chemical safety assessment

EC50/LC50 for freshwater invertebrates:
0.938 mg/L

Additional information

In a 48-hour acute toxicity study (OECD 202), neonate Daphnia magna were exposed to Methacrolein at nominal concentrations of 0 (control), 0.46, 1.0, 2.2, 4.6 and 10 mg/L under static conditions under light exclusion in accordance with the OECD 202 guideline. The water pH, temperature and dissolved oxygen were within acceptable guideline specifications. Immobilization (mortality) and sublethal effects were observed daily. The 48 hour EC50 values determined in this acute toxicity study were 0.938 mg/L based on the nominal concentration of the test substance (BASF, 2018).

Data are available for the analog substance acrylaldehyde (CAS 107-02-8).

For fish (Pimephales promelas) a LC50 (96 h) of 19.5 µg/L was determined and for invertebrates (Daphnia magna) an EC50 of 0.09 mg/L were measured.