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Ecotoxicological information

Toxicity to microorganisms

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Description of key information

IC 50 (3 h) >100 mg/L

Key value for chemical safety assessment

EC50 for microorganisms:
100 mg/L

Additional information

The inhibitory effect of the substance on aerobic waste-water bacteria was investigated in a respiration test, according to the OECD Guideline 209 (1984). The oxygen concentration was measured after a contact time of 180 minutes with activated sludge fed with a standard amount of synthetic sewage feed. The test substance showed a slight inhibition (7.5 %) of the respiration rate at a concentration of 100 mg/l and so the IC 50 (3 h) was determined to be >100 mg/l.

In conclusion, as the validity conditions were respected, the substance was found not to be toxic to waste-water bacteria.