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Ecotoxicological information

Long-term toxicity to aquatic invertebrates

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Description of key information

The chronic toxicity of Cyclaprop towards Daphnia magna was investigated according to OECD guideline 211 under GLP. Daphnids were exposed to nominal concentrations of 0.11, 0.33, 1.0, 3.0 and 9.0 mg/l for 21 days in a flow-through system. Mean measured concentrations were within 20% of the nominal concentrations and therefore nominal concentrations were used to calculate the results. The NOEC and EC50 for survival were 1 and 1.8 mg/l, respectively. The NOEC and EC50 for reproduction were 1 and 2.6 mg/l, respectively. Some issues with oily slick in the test chambers were seen presenting potentially physical effects. At the test concentrations, however, no differentiation could be made between physical and systemic effects and therefore the above mentioned values are used for classification and labelling, PNEC derivation and PBT assessment.

Key value for chemical safety assessment

Fresh water invertebrates

Fresh water invertebrates
Effect concentration:
1 mg/L

Additional information