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Toxicity to microorganisms

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Description of key information

The inhibition of the degradation activity of activated sludge is not

anticipated when introduced in appropriate low concentrations

Key value for chemical safety assessment

Additional information

For the determination of toxicity to microorganisms of 2-dimethylaminoethyl methacrylate one study is reported using Pseudomonas putida as test organism. The result of this investigation showed a EC10 of 42.7 mg/L. However, since the documentation for the toxicity assessment to microorganisms of the test substance is insufficient, the report of this study is not reliable. Hence, the assessment of the test substance was made on the structural analogues 2-dimethylaminoethyl acrylate (CAS# 2439-35-2). The toxicity of this substance on microorganisms was determined in two different studies using Pseudomonas putida (EC10 = 210 mg/L) and activated sludge from industrial sewage treatment plant (EC20 > 1000 mg/L), respectively. The results of these investigations showed no significant toxicity to microorganisms. Therefore, an inhibition of the degradation activity of activated sludge is unlikely when the test substance is introduced in appropriate low concentrations.