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Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

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Description of key information

The acute toxicity of Cyclaprop towards Desmodesmus subspicatus was investigated according to OECD guideline 201 under GLP. Algal cells were exposed to nominal concentrations of 3, 6, 12, 24, and 48 mg/l and observed for 72 hours. Geometric mean measured concentrations of the substance were found to be 60 -70% of nominal. Based on measured concentrations, the 72h-ErC50 and 72h-EC10 for growth rate were found to be 2.5 and 1.9 mg/l, respectively.

Key value for chemical safety assessment

EC50 for freshwater algae:
2.5 mg/L
EC10 or NOEC for freshwater algae:
1.9 mg/L

Additional information