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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Ecotoxicological information

Toxicity to aquatic algae and cyanobacteria

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Administrative data

Link to relevant study record(s)

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