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Ecotoxicological information

Toxicity to microorganisms

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Description of key information

The EC50 (30 minutes) of the substance was determined to be >100 mg/L.

Key value for chemical safety assessment

Additional information

The inhibitory effect of the substance on aerobic waste water bacteria of activated sludge was investigated in a respiration test according to OECD Guideline No. 209. This study examined nominal test article concentrations in the range from 3.2 mg/L to 100 mg/L.

The respiration rate of aerobic waste water bacteria was not or only slightly inhibited (-9.1 to 1.9 %) when exposed to the test article concentrations in the range from 3.2 to 100 mg/L. The EC50 (30 minutes) was therefore determined to be >100 mg/L.

The EC50 (30 minutes) for the reference compound 3,5-dichlorophenol, which was tested under the same conditions as the test article, was found to be at 21.7 mg/L and therefore lies within the range of 5 - 30 mg/L recommended by the test guideline.