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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

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Diss Factsheets

Ecotoxicological information

Toxicity to microorganisms

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Administrative data

Link to relevant study record(s)

Description of key information

A study (BASF SE, 2015) was performed according to OECD 209 (2010) to determine the toxic effects of the test substance on the oxygen consumption rate of aerobic micro-organisms (activated sludge) after 180 min. The EC50 of the test substance after 180 minutes was determined to be greater than 1000 mg/L and the EC10 was determined to be 160 mg/L.

Key value for chemical safety assessment

EC10 or NOEC for microorganisms:
160 mg/L

Additional information

A study (BASF SE, 2015) was performed according to OECD 209 (2010) to determine the toxic effects of the test substance on the oxygen consumption rate of aerobic micro-organisms (activated sludge) after short-term exposure of 180 min compared with the blank control. The nominal concentrations of the test substance were: 0 (control), 62.5, 125, 250, 500 and 1000 mg/L. No concentrations were measured. The inoculum was activated sludge from a municipal waste treatment plant of Mannheim (Germany), non-adapted. The sludge concentration was 1.5 g/L (dry weight) and a synthetic medium according to the guideline was used. A reference substance (3,5 dichlorophenol) was used as positive control. The EC50 of 3,5-dichlorophenol was determined to be 8.9 mg/L after 180 min. The validity criterion was met. The EC50 of the test substance after 180 minutes was determined to be greater than 1000 mg/L and the EC10 was determined to be 160 mg/L.

Additionally a supporting study (BASF AG, 1990) according to OECD 209 (1993) was performed to determine the toxicity of the test substance after 30 min of exposure. The EC20 was determined to be ca. 110 mg/L and the EC50 was determined to be 170 mg/L after 30 minutes. No EC10 value was given.