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Ecotoxicological information

Toxicity to microorganisms

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Description of key information

No inhibition of microorganisms was observed in the toxicity control of a ready biodegradability test at a concentration of 40 mg/L.

Key value for chemical safety assessment

EC10 or NOEC for microorganisms:
40 mg/L

Additional information

According to the ECHA Guidance document R7b, no further test on the toxicity to microorganisms has to be conducted if the toxicity control in a ready biodegradability test shows no inhibitory effects on microorganisms. As the toxicity control in the 301F ready biodegradability test showed no inhibition of the microbial activity at a substance concentration of 40 mg/L, no further test is necessary to evaluate the respiration inhibition of activated sludge. The concentration used in the toxicity control (40 mg/l) can be used as NOEC value.