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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Lemna Growth Inhibition: EC50 (4d) = 96 mg/L Manganese (II) acetate (corrected value) for Lemna minor (equivalent to OECD 221, static)

Key value for chemical safety assessment

EC50 for freshwater plants:
96 mg/L

Additional information

The testing was performed similar to OECD guideline 221, the documentation and given results indicate that the study was well-performed and satisfies general scientific requirements. So the study is classified as reliable with restrictions and consequently, the results can be considered to be reliable. Additionally, the test organism Lemna minor broadens the spectrum of aquatic organisms and, as an additional model, allows a deeper insight in the expectable effects of the test substance on the aquatic environment. Therefore, these results should be also taken into account when assessing the need for classification. The prevalent study was consequently considered to suitable to support the results from IUCLID endpoint 6.1.5 "Toxicity to aquatic algae and cyanobacteria" and the non-classification: A 4 d EC50 value of 31 mg/L Mn2+, corresponding to 96 mg/L Manganese (II) acetate, was obtained. Taking into account that Manganese (II) acetate as an inorganic salt has no potential for bioaccumulation, Manganese (II) acetate does not need to be classified as harmful to the aquatic environment, based on the effects on Duckweed, according to regulation 1272/2008/EC. This conclusion is congruent to the results obtained in the testing for aquatic algae toxicity.