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Ecotoxicological information

Short-term toxicity to fish

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Description of key information

Acutely harmful to aquatic organisms.

Key value for chemical safety assessment

Additional information

The acute toxicity of Bronopol to bluegill sunfish (Lepomis macrochirus) was tested in a flow-through test system according to US EPA Guideline OPP 72 -1 [The Boots Company 1984 (a)]. After 96 hours, the LC50 was determined to be 35.7 mg/L (measured), whereas symptoms of toxicity occurred at a concentration of 20 mg/L (measured), resulting in a NOEC of 11.4 mg/L (measured).

Two supporting studies conducted under equal testing conditions as the key study show similar results [The Boots Company (b) and (c)]. The LC50 for Salmo gairdneri was determined to be 41.2 mg/L (measured) after 96 h and the LC50 for the seawater species Cyprinodon variegatus was determined to be 57.6 mg/L (measured) after 96 h, respectively.