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Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

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Description of key information

The substance's acute toxicity EC50 to algae was 32 mg/l.

Key value for chemical safety assessment

EC50 for freshwater algae:
32 mg/L
EC10 or NOEC for freshwater algae:
4.6 mg/L

Additional information

In the only available (and reliable) study the toxicity of the test substance toDesmodesmus subspicatus was investigated according to OECD test guideline 201 under GLP. In a 72h test, five test concentrations (4.6 /10 / 22 / 46 / 100 mg/L) were tested. Using a validated photometric method, agreement of nominal and measured concentrations was confirmed. All validity criteria were fulfilled. Based on cell numbers, the EC50 (72h) was determined to be 32 mg/L with a corresponding NOEC of 4.6 mg/L