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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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 (Lemna minor, 7d, frond number) > 100 mg/L (nominal, verified by measured conc.)

Key value for chemical safety assessment

EC50 for freshwater plants:
100 mg/L

Additional information

This study was performed in order to evaluate the toxicity of tehe test item towards Lemna minor following the OECD Guideline 221 (2006).The study was performed using 5 concentrations ranging from 1.0 to 100 mg/L (nominal concentration). Incubation time was 7 days. The frond number of each replicate was determined at the beginning, at day 2 and 5 during the test and at the end of the experiment. Additionally, the dry mass of 12 representative fronds was determined at the beginning of the experiment. At the end of the experiment the dry mass of each replicate was determined.

Growth rate µ and the yield were determined from the frond number and the drymass at the respective observation times.

At the start and at the end of the test, the content of the test item in the test solutions was determined using a Photometer.

The measured concentrations of the test item lay between 90 % and 98 % of the nominal concentrations at the beginning of the test and between 74 % and 99 % of the nominal concentrations at the end of the test. As the lowest concentration (4.6 mg/L) is not used for statistical evaluation, all other measured concentrations lay in the range ± 20 % of the nominal values. Therefore, the determination of the results was based on the nominal concentrations.