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Ecotoxicological information

Toxicity to aquatic plants other than algae

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Description of key information

EC50 (7 d, Lemna minor) = 100 - 1000 mg/L

Key value for chemical safety assessment

EC50 for freshwater plants:
100 mg/L

Additional information

The following data was obtained for the Similar Substance 02. It is expected that the Target substance will present similar effect levels to aquatic plants other than algae. Justification for Read Across is given in Section 13 of IUCLID.

The inhibitory effects of the test item to Lemna minor were investigated over a period of 7 days, according to the OECD Guideline 221 (2006). The test was performed at concentrations of 10, 100 and 1000 mg/l of the active ingredient. The determination of the effect concentrations was based on the nominal concentrations, assuming the test item to be stable in water for the whole test period.

Based on the data observed with respect to growth rate and yield for the endpoint frond numbers, the ErC50 and the EyC50 were found to be 100 -1000 mg/l and about 100 mg/l based on active ingredient, respectively. The no-observed-effect concentrations to Lemna minor with respect to growth rate (NOErC) and yield (NOEyC) for the endpoint frond numbers were 10 mg/l active ingredient, as determined by Dunnett's test.