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Ecotoxicological information

Toxicity to microorganisms

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Description of key information

3h-EC50 (activated sludge microorganisms, respiration) > 1000 mg/L, 3h-NOEC (activated sludge microorganisms, respiration) >= 1000 mg/L.

Key value for chemical safety assessment

Additional information

Toxicity on the respiration of activated sludge was investigated in a reliable key study according to OECD 209 and in compliance with GLP (RCC, 2000, RL2). The test was performed with concentrations up to 1000 mg/L test item. During exposure, no negative effects on the respiration rate of the activated sludge was observed at any test concentrations. In conclusion, the test item showed no sign of toxicity to activated sludge microorganisms up to 1000 mg/L test item. Derived effect concentrations were based on nominal test concentrations: 3h-EC50 > 1000 mg/L, 3h-NOEC >= 1000 mg/L.