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Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

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Description of key information

EC50 (72 h) > 1000 mg/l (nominal)

Key value for chemical safety assessment

EC50 for freshwater algae:
1 000 mg/L
EC10 or NOEC for freshwater algae:
500 mg/L

Additional information

The influence of the test item on the growth of the green alga Scenedesmus subspicatus chodat was investigated. The study was performed according to the OECD Guideline 201. Based on the growth inhibition curve, the NOEC and the LOEC values were found to be 500 mg/l and 1000 mg/l, respectively. The EC50 values after 72 and 96 hours was >1000 mg/l (RCC Umweltchemie AG., 1990).

The result is in agreement with a supporting study, for which just a summary is available (Solvias AG, 1999).