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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. IC20 (3h) > 100 mg/L (nominal) for activated sludge (OECD 209). No adverse effects were observed.

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Additional information

The influence on the respiration inhibition of microorganisms was investigated in a guideline study according to OECD 209 [CIBA-GEIGY 1988]. The study was conducted with activated sludge from municipal sewage treatment plant, which receives domestic sewage. After 3 hours of exposure an IC20 of > 100 mg/L (nominal) was determined.