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Ecotoxicological information

Toxicity to microorganisms

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Description of key information

NOEC (3 hours) of the respiration inhibition of activated sludge microorganisms is  32 mg/L; The EC50 >320 mg/L. 
No toxicity to the microorganisms was observed in a Zahn-Wellens Test for biodegradation at 1000 mg/L.

Key value for chemical safety assessment

EC10 or NOEC for microorganisms:
32 mg/L

Additional information

An new OECD 209 study, an older OECD209 with some deficiencies and an old Zahn-Wellens test for biodegradation are available. The newest OECD209 study reports an NOEC of 32 mg/L.

The concentration without toxic effect on the microorganisms in the biodegradation study is 1000 mg/L and confirms the low toxicity of the substance.

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