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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

ECr50 > 100 mg/l based on frond number

ECr50 > 100 mg/l based on dry weight

Key value for chemical safety assessment

Additional information

No information on "toxicity to aquatic plants other than algae" is available for the Target Substance. However data on Similar Substance 02 has been taken into account for the assessment. More details about the similarity between the two substances are reported in section 13.

The growth inhibitory effects of the test substance to the duckweed Lemna minor were investigated according to test guideline OECD 221, under static conditions over a period of 7 days.

The test solutions were prepared by dissolving the test item in Swedish Standard medium. The test was performed as a limit test at 100 mg/l nominal concentration.

Six parallel test vessels were used for the test concentration and six vessels for the blank controls.

The test concentrations during the 7-day test period weredetermined by photometry at the beginning of the test, as well as after 3, 5 and 7 days of exposure. These analyses confirmed the right dosage of the test item, and showed that the concentrations of the test item could be satisfactorily maintained over the 7-days test period. Therefore, the effective concentrations (ErC50and EyC50) were assessed based on the nominal concentration. 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.