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Ecotoxicological information

Toxicity to microorganisms

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Description of key information

IC50 (3 h, activated sludge bacteria) = 2200 mg/l (nominal)

Key value for chemical safety assessment

EC50 for microorganisms:
2 200 mg/L

Additional information

The inhibitory effect of the test item on aerobic waste-water bacteria was investigated in a respiration inhibition test, according to ETAD 103 (1979), a method comparable to the OECD Guideline 209 (1984). Activated domestic sludge bacteria, fed with a standard amount of synthetic feed, was exposed to 560, 1000, 1800, 3200 and 5600 mg/l and two negative controls for a total of 3 hours. The oxygen concentration was measured after 3 hours and used to calculate the amount of inhibition. No reference substance was tested.