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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

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Ecotoxicological information

Short-term toxicity to fish

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Link to relevant study record(s)

Description of key information

Short-term toxicity to fish: Determination of Acute toxicity to Rainbow trout (Oncorhynhcus mykiss (fresh water species)) under flow through conditions:
Short-term toxicity to fish: LC50 (96h) = 30 mg/l  (26-34 mg/l, 95% confidence intervals) for Oncorhynhcus mykiss (EPA OPP 72-1 (Fish Acute Toxicity Test), flow-through)
Determination of Acute toxicity to Sheepshead minnow (Cyprinodon variegatus, (marine species)) under flow through conditions.
Short-term toxicity to fish: LC50 (96h) = 38 mg/l (95% confidence intervals 27-43 mg/l) for Cyprinodon variegatus (EPA OPP 72-1 (Fish Acute Toxicity Test), flow-through)

Key value for chemical safety assessment

Fresh water fish

Fresh water fish
Effect concentration:
30 mg/L

Marine water fish

Marine water fish
Effect concentration:
38 mg/L

Additional information

Fluometuron is of low toxicity to fish:

The 96 hour LC50 for fluometuron under flow through conditions was 30 mg/l (26-34 mg/l, 95% confidence intervals). The NOEC was 4.3 mg/l based on darkened pigmentation at 7.7 mg/l.

The 96 hour LC50 for marine water fish (sheepshead minnow (Cyprinodon variegatus)) for fluometuron under flow through conditions was 38 mg/l (95% confidence intervals 27-43 mg/l), and the NOEC was 17 mg/l.