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Toxicity to aquatic algae and cyanobacteria

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Description of key information

Methacrylaldehyde is acutely very toxic to aquatic algae.

Key value for chemical safety assessment

Additional information

Since no test data on the actute toxicity of methacrylaldehyde (CAS 78-85-3) to invertebrates are available a conclusion by analogy approach to acrylaldehyde (CAS 107-02-8) has been applied. In this algae growth inhibition test according to the German National Standard DIN 28692 with the algae Desmodesmus subspicatus an EC50 (72 h) of 0.061 mg/L based on the growth rate was determined. The corresponding NOEC (72 h) was 0.01 mg/L.