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Ecotoxicological information

Short-term toxicity to fish

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Description of key information

The 96-h LC50 of the substance for fish was well beyond its water solubility (<0.64 mg/l) and exceeded a nominal concentration of 100 mg/l, corresponding to an average concentration of 55 mg/l and defined as a dispersion of the undissolved fraction.

Key value for chemical safety assessment

LC50 for freshwater fish:
55 mg/L

Additional information

The test substance was assessed for acute toxicity to fish according to EU Method C1 under semi-static conditions for 96 hours.

Two limit tests were performed with carp exposed to 100 mg/l (filtered as well as unfiltered) in a static system. In the first test the test solution was prepared using Tween 80 as a dispersent. In the second test no additive was used. Samples for analysis were taken at the start and the end of the second test and analysed for determination of Total Organic Carbon.

The substance induced no lethal effects in carp when exposed to an extremely supersaturated dispersion of 100 mg/l. The test that did not include the use of a dispersant showed that such a dispersion did not induce any visible effects in carp.

The 96-h LC50 of the substance for fish was well beyond its water solubility (<0.64 mg/l) and exceeded a nominal concentration of 100 mg/l, corresponding to an average concentration of 55 mg/l and defined as a dispersion of the undissolved fraction. The presence of undissolved and flocculating test substance had no visible physical effects on the fish exposed.