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Ecotoxicological information

Toxicity to aquatic plants other than algae

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Link to relevant study record(s)

Description of key information

ErC50 = 10.6 mg/l (effects on dry weight)

ErC50 = 17.5 mg/l (effects on frond number)

Key value for chemical safety assessment

EC50 for freshwater plants:
10.6 mg/L
EC10 or NOEC for freshwater plants:
3.36 mg/L

Additional information

One test is available on the similar substance 1.


The inhibitory effects of the test substance to the duckweed Lemna minor were investigated over a period of 7 days, based on the frond number and biomass (dry weight), following the guideline OECD 221.


The test item is solid,well soluble, and has a purity of 61.9% (active ingredient). The test solutions were prepared by respective dilutions of a stock solutionin STEINBERG Medium.


The test was performed at 100, 50.0, 25.0, 12.5 and 6.25 mg/l nominal concentration of test item, corresponding to 61.9, 31.0, 15.5, 7.74 and 3.87 mg/l of the active ingredient.


The two endpoints, frond number and biomass (dry weight) were investigated at days 3, 5 and 7, and each of them were assessed as growth rate and yield. Under the test condition the substance showed:


 


ErC50 (frond number) = 17.5 mg/l


ErC50 (dry weight) = 10.6 mg/l

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