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Ecotoxicological information

Toxicity to microorganisms

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Description of key information

Determination of the toxicity to Activated Sludge in a Respiration Inhibition Test with FAT 40870/A TE.

Key value for chemical safety assessment

EC50 for microorganisms:
1 000 mg/L

Additional information

The study was performed to assess the effect of the test item on the respiration of activated sewage sludge. 

Activated sewage sludge was exposed to an aqueous solution of the test item at concentrations of 10, 100 and 1000 mg/L for a period of 3 hours with the addition of a synthetic sewage as a respiratory substrate.

The effect of the test item on the respiration of activated sewage sludge gave a 3‑Hour EC50value of greater than 1000 mg/L. The No

Observed Effect Concentration (NOEC) after 3 hours exposure was 1000mg/L.

It can be conclude that the test item is not toxic and have no effect on the respiration of activated sewage sludge.