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Ecotoxicological information

Toxicity to microorganisms

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Description of key information

IC50, 3h, static > 1000 mg/l

IC20, 3h, static > 1000 mg/l

Key value for chemical safety assessment

EC50 for microorganisms:
1 000 mg/L

Additional information

One study (1997, Ciba) was performed on FAT40564/A following OECD 209 to determine the inhibitory effect on the respiration activity of activated sludge. The inhibitory effect of the test substance at a particular concentration was expressed as a percentage of the mean respiration rates of two controls and IC50 was determened to be > 1000 mg/l for the tested substance and IC50 was 9.0 mg/l for the reference substance (95% confidence limits 6.93 - 11.26 mg/l).