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Ecotoxicological information

Toxicity to microorganisms

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Description of key information

EC50 > 100 mg/L

Key value for chemical safety assessment

EC50 for microorganisms:
100 mg/L

Additional information

The activated sludge was exposed to Direct Brown 44 at a concentration of 100 mg/L. The respiration rate of each mixture was determined after aeration periods of 3 hours.The EC50 is higher than 100 mg/L.

The effect value is related to nominal concentration, since no analytical monitoring was performed.