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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:
1 000

Additional information

As key study concerning acute toxicity to microorganisms a test performed by BASF (1999) according to OECD guideline 209 was identified, using domestic activated sludge as inoculum. In the static test an EC20 >1000 mg/L for the respiration inhibition after 30 minutes of exposure was calculated related to the nominal concentration.