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Ecotoxicological information

Toxicity to microorganisms

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Description of key information

The substance caused 6.67 % respiration inhibition of activated sludge at the highest test item concentration of 1000 mg/L. An EC10 and an EC50 of >1000 mg/L after 3 hours were obtained in this test. The effect value relates to nominal concentration, since no analytical monitoring was performed (Neuhahn, 2011d).

Key value for chemical safety assessment

EC50 for microorganisms:
1 000 mg/L
EC10 or NOEC for microorganisms:
1 000 mg/L

Additional information

A study was performed to assess the toxicity of the substance to bacteria.

The activated sludge from predominantly domestic sewage plant was exposed to the test solution of three nominal concentrations of the substance (10, 100 and 1000 mg/L), blank control solution and solution with positive reference substance for a period of 3 hours. Dissolved oxygen was recorded and respiration rates were calculated. No physico-chemical oxygen consumption was observed at the highest concentration of test substance. The substance caused 6.67 % respiration inhibition of activated sludge at a test item concentration of 1000 mg/L. The EC50 is higher than 1000 mg/L.