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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

The inhibitory effect of the test item on the growth of the freshwater aquatic plant Lemna gibba was determined according to OECD guideline 221. Cultures of Lemna gibbawere exposed in a semi-static test to the test item concentrations 100, 32, 10, 3.2 and 1.0 mg/L. The inhibition of growth in relation to control cultures was determined over a test period of 7 days.

This study encompassed 6 treatment groups (5 dose rates of the test item and a control) with three replicates per test concentration and control. At test start 12 fronds were introduced in each replicate. Beside other parameters growth rates based on frond numbers were determined. The following results were reported:


EC50 (7 d) > 100 mg/L

EC20 (7 d) = 17.1 mg/L

EC10 (7 d) = 3.14 mg/L

NOEC (7 d) = 1.0 mg/L

Key value for chemical safety assessment

Additional information