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Ecotoxicological information

Short-term toxicity to aquatic invertebrates

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Link to relevant study record(s)

Description of key information

MoE 1998: EC50-48h= 25 mg/L. Daphnia magna
Kent 1993: EC50-48h= 32 mg/L. Daphnia magna

Key value for chemical safety assessment

EC50/LC50 for freshwater invertebrates:
25 mg/L

Additional information

There are two key studies for the determination of the acute toxicity of n-BMA to aquatic invertebrates, using the fresh water flea Daphnia magna as test organism. The results are in close agreement: EC50-48h= 25 (MoE, 1998) and 32 mg/L (Kent et al. 1993). A third, Company owned study, GLP compliant, reinforces the conclusion with an EC50-48h = 29mg/L.

There is no data on marine invertebrates, but studies with the common metabolite of the category, methacrylic acid, indicate that marine species are not expected to be more sensitive to methacrylates than freshwater species (Sverdrup, 2001).