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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

Additional information

The toxicity to microorganisms was determined in a GLP Respiration Inhibition Test OECD guideline 209 using domestic activated sludge. After 30 min the EC20 was >1000 mg/L based on nominal concentrations (BASF AG, 2000). In a supporting study the toxicity to microorganisms was determined in a growth inhibition test according to DIN 38412, part 8. After 16h the EC10 was 5800 mg/L based on nominal concentrations (BASF AG, 1991). An inhibition of the activity of microorganisms in wastewater treatment plants is not expected.