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Ecotoxicological information

Toxicity to microorganisms

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Description of key information

The NOEC of the substance is 100 mg/L, the EC50 is > 1000 mg/L  and the EC10 is 262 mg/L to activated sludge of a municipal sewage treatment plant.

Key value for chemical safety assessment

EC10 or NOEC for microorganisms:
262 mg/L

Additional information

A Respiration Inhibition Test with activated sludge according to OECD 209 was carried out with the substance under static conditions with the nominal substance concentrations 100 -320 -1000 mg/L. The respiration rates of the control, reference and test substance replicates were measured after a contact time of 3 h, and the inhibitory effects of the test and reference substance were determined in comparison to the control respiration rates. The mean inhibition of respiration for the test substance replicates ranged from 2 % to 24 %.

As a result of the test, the NOEC of the substance was determined to be 100 mg/L, the EC50 is > 1000 mg/L and the EC10 is 262 mg/L to activated sludge of a municipal sewage treatment plant.