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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 toxic potential of the substance to microorganisms was evaluated by considering data on Similar Substance 01, due to the absence of data on the substance itself. Justification for Read Across is given in Section 13 of IUCLID.

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