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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Short-term toxicity to fish

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Administrative data

Link to relevant study record(s)

Description of key information

The acute toxicity of Cyclacet towards Brachydanio rerio was investigated according to OECD TG 203 in compliance with GLP. Fish were exposed to nominal concentrations of 3, 6, 12, 24 and 48 mg/l under flow-through conditions and observed for 96 hours. No mortality was observed in the control and concentrations 3, 6 and 12 mg/l, whereas 100% mortality was reported after 24 h in 24 and 48 mg/l exposure. The 96h-LC50 is derived from the geometric mean of the LC0 and the LC100 value of 10.9 mg/l and 23.1 mg/l resulting in 15.8 mg/l based on mean measured concentrations.

Key value for chemical safety assessment

Fresh water fish

Fresh water fish
Effect concentration:
15.8 mg/L

Additional information