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Ecotoxicological information

Short-term toxicity to fish

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Description of key information

LC50 values (96h) > 200 and 500 mg test substance/L (184 and 460 mg a.i./L) (Salmo gairdneri and Cyprinus carpio respectively)

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Additional information

The acute toxicity of sodium 2,4-dichlorophenoxyacetate (CAS No. 2702-72-9) to fish species was investigated by Raszka (1996). This test was conducted according to OECD Guideline No. 203, Fish, Acute Toxicity Test (1992). After 96 hours exposure to the test item under static conditions, no effects were observed in Salmo gairdneri and Cyprinus carpio up to the highest concentration tested for each species, being the LC50s greater than 200 and 500 mg test substance/L (corresponding to 184 and 460 mg a.i./L respectively). Additional toxicity data on fish species (Pimephales promelas) could be gathered testing the main degradation product of this substance in water, 2,4 -dichlorophenoxyacetic acid, resulting in a LC50 of 100 mg a.i./L (European Commission, 2001)