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Ecotoxicological information

Short-term toxicity to fish

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Description of key information

A well recognized published study on the acute toxicity of organic chemicals to fathead minnow using flow-through methodology.

Key value for chemical safety assessment

Fresh water fish

Fresh water fish
Effect concentration:
131 mg/L

Additional information

A 96-hour acute toxicity test of 2-Heptanone (CAS 110 -43 -0) was conducted using fathead minnows (Pimephales promelas) in a flow-through diluter system. The test was conducted with 5 exposure concentrations and a control with 20 juvenile fish in each exposure replicate. LC50 (mortlity) values were calculated based upon mean measured exposure concentrations. The 96 -hour LC50 values was estimated to be 131 mg/L. A NOEC value for mortality was not calculated in the study, but as there was no mortality observed in any concentration up to and including the 104 mg/L concentration, the NOEC for mortality can be emperically estimated to be ≥ 104 mg/L.