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Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

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Description of key information

EC50 (72 h) 85.1 mg/L (growth), NOELR (72 h) 46 mg/L (growth), EC50 (72 h) 46.9 mg/L (biomass), NOELR (72 h) 10 mg/L (biomass) (OECD 201)

Key value for chemical safety assessment

EC50 for freshwater algae:
46.9 mg/L
EC10 or NOEC for freshwater algae:
10 mg/L

Additional information

Toxicity of the substance to Desmodesmus subspicatus was tested in a study performed according to OECD 201, where the algae was exposed for 72 h to nominal loading rates of 4.6, 10, 22, 46 and 100 mg/L as water accommodated fraction prepared in accordance with OECD 23. At 46 and 100 mg/L clumping of cells was observed. As a result, the EL50 (72 h) and the NOELR for growth rate were found to be 85.1 mg/L and 22 mg/L, respectively. In addition, the EL50 (72 h) and the NOELR for biomass were 46.9 mg/L and 10 mg/L, respectively