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Ecotoxicological information

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

EC50 for microorganisms:
1 050 mg/L
EC10 or NOEC for microorganisms:
589.6 mg/L

Additional information

The toxicity of 1-methyl-1H-imidazole (CAS 616-47-7) to microorganisms was investigated in a growth inhibition guideline study performed according to DIN 38412-8, using Pseudomonas putida as test organism. After 7 h of incubation, the EC10 was determined to be 589.6 mg/L (7h EC50 = 1050 mg/L), based on nominal test concentrations.