Registration Dossier

Ecotoxicological information

Toxicity to microorganisms

Currently viewing:

Administrative data

Link to relevant study record(s)

Description of key information

Under the test conditions, the test substance showed 18.2 % respiration inhibition of activated sludge at a concentration of 10000 mg/L. The EC50 was determined to be > 10000 mg/L.

Key value for chemical safety assessment

EC50 for microorganisms:
10 000 mg/L

Additional information

A study conducted to EU test guidance Part C11 and OECD test guideline 209 in compliance with GLP to determine the toxicity of Reactive Blue 75311 on bacteria of the sewage sludge.

The activated sludge was exposed to test substance at three different concentrations, 100, 1000, and 10000 mg/L. The incubation time was 30 minutes with permanent aeration. The test substance showed 18.2 % respiration inhibition of activated sludge at a concentration of 10000 mg/L. The EC50 was determined to be > 10000 mg/L.