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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Ecotoxicological information

Toxicity to aquatic plants other than algae

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Administrative data

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