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Ecotoxicological information

Toxicity to microorganisms

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Description of key information

EC50 (3h) > 1000 mg/l (nominal)

NOEC (3h) ≥ 1000 mg/l (nominal)

Key value for chemical safety assessment

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

Additional information

No data is available for the toxic potential of the substance to microorganisms. Therefore, data on a similar substance is used instead. Justification for Read Across is given in Section 13 of IUCLID.

The inhibition of the respiration of activated sludge when exposed to Similar Substance 01 was determined according to the OECD 209 and EU Method C.11. One valid experiment was performed. Activated sludge from a biologic sewage, taken from a domestic sewage treatment plant, was exposed to 4 concentrations ranging from 1000 to 1 mg/l nominal concentration for 3 hours. The dry matter was determined as 2.34 g suspended solids/l, giving a concentration of 1.17 g suspended solids/l in the test. A positive control run in parallel and an EC50 of 9.6 mg/l was determined. As no significant inhibition was observed during the exposure of activated sludge with the test item, no additional experiment had to be performed.

NOEC (3h) ≥ 1000 mg/l; EC10 (3h) > 1000 mg/l; EC50 (3h)> 1000 mg/l

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