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Ecotoxicological information

Toxicity to microorganisms

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Link to relevant study record(s)

activated sludge respiration inhibition testing
Data waiving:
study scientifically not necessary / other information available
Justification for data waiving:
Reason / purpose for cross-reference:
reference to same study

Description of key information

In a ready biodegradability test no toxic effects to microorganisms were observed after incubation with 1.0 mg/L test substance.

Key value for chemical safety assessment

EC10 or NOEC for microorganisms:
1 mg/L

Additional information

No study on the toxicity to microorganisms is available. 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 Ready Biodegradability test (Closed Bottle) showed no inhibition of the microbial activity at a substance concentration of 1.0 mg/L, no further test is necessary to evaluate the respiration inhibition of activated sludge. The concentration used in the toxicity control (1.0 mg/L) can be used as NOEC value.