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Ecotoxicological information

Toxicity to microorganisms

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Description of key information

0% respiration inhibition of activated sludge at a test item concentration of 10000 mg/l
EC50> 10000 mg/l

Key value for chemical safety assessment

EC50 for microorganisms:
10 000 mg/L
EC10 or NOEC for microorganisms:
10 000 mg/L

Additional information

A study was performed to assess the toxicity of Indigo aus Indigo-Küpe 40 % to bacteria. The study was conducted in accordance with the Commission Directive 88/302/EEC; Official Journal of the EC L133 Part C (1988).

The activated sludge was exposed to Indigo aus Indigo-Küpe 40 % at different concentrations.

The respiration rate of each mixture was determined after aeration periods of 3 hours.

Indigo aus Indigo-Küpe 40 % showed 0 % respiration inhibition of activated sludge at a test item concentration of 10000 mg/L.

Thus, the EC50is higher than 10000 mg/L.