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Ecotoxicological information

Short-term toxicity to fish

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Description of key information

The acute toxicity of the test substance to fish was assessed in two studies conducted on Pimephales promelas, which revealed LC50 values of 6.7 mg/L and 10.8 mg/L. For risk assessment and C+L a key value of 6.7 mg/L was used.

Key value for chemical safety assessment

LC50 for freshwater fish:
6.7 mg/L

Additional information

Two publications are available in which the acute toxicity of the test item to fish was determined. These publications are used in a weight of evidence approach.

The first publication describes a 96 hours test conducted on Pimephales promelas. 20 fish each were exposed to one of the following nominal test substance concentrations: 0 (control), 8.48, 13, 20.1, 30.9 and 47.5 mg/L, mean measured concentrations were 0, 7.46, 11.5, 17.0, 26.1, 42.2 mg/L. Mortality occurred in every dose group but not in the control group. The LC50 value was determined to be 10.8 mg/L.

In the second publication a study is described which was also conducted on Pimephales promelas, in this assay the fish were exposed to the test substance in a flow through system. Five concentrations were tested. As a result, the LC50 was determined to be 6.7 mg/L.