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Ecotoxicological information

Toxicity to microorganisms

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Description of key information

The test substance is not toxic to activated waste water bacteria at 100 mg/L after a contact period of 3 hours.

Key value for chemical safety assessment

EC50 for microorganisms:
100 mg/L
EC10 or NOEC for microorganisms:
100 mg/L

Additional information

A test was conducted (to OECD Guideline 209) to determine the acute toxicity of the test substance to bacteria in an aerobic, waste water medium. The extent of acute toxicity was determined by comparing the oxygen consumption of an aerobic activated sludge fed with the reference compound to the oxygen consumption obtained in an activated sludge containing the test substance under the same conditions. The oxygen consumption was measured and recorded after an aeration time of 3 hours (contact time).

The test concentrations used in the study were 1.6, 3.6, 10.8, 32.2 and 99.6 mg/L

The test substance is non-inhibitory to the bacteria in activated waste water at a contact time of 3.0 hours.