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Ecotoxicological information

Toxicity to microorganisms

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Description of key information

NOEC (3h) ≥ 1000 mg/l

EC10 (3h) > 1000 mg/l

EC50 (3h) > 1000 mg/l

Key value for chemical safety assessment

EC50 for microorganisms:
1 000 mg/L
EC10 or NOEC for microorganisms:
1 000 mg/L

Additional information

The effect of the substance on the respiration of activated sludge obtained from a domestic sewage treatment plant was evaluated according to the OECD Guideline 209 and EU method C.11. The effects on micro-organisms from activated sludge were determined by measuring their respiration rate under defined conditions in the presence of different concentrations (1, 10, 100, 1000 mg/l) of the test substance. The respiration rates of samples of activated sludge fed with synthetic sewage were measured in an enclosed cell containing an oxygen electrode after a contact time of 3 hours. The sensitivity of each batch of activated sludge was checked with a positive control.

NOEC (3h) ≥ 1000 mg/l

EC10 (3h) > 1000 mg/l

EC50 (3h) > 1000 mg/l