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Ecotoxicological information

Toxicity to aquatic plants other than algae

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Description of key information

ErC50 (7d): 100-1000 mg/l
EyC50 (7d): 100 mg/l

Key value for chemical safety assessment

EC50 for freshwater plants:
100 mg/L

Additional information

The inhibitory effects based on the average specific growth rate and the yield (absolute increase in plant size) of the test item to the duckweed Lemna minor was investigated over a period of 7 days. The test was performed at concentrations of 10, 100 and 1000 mg/l of the active ingredient. Taking into account a purity of about 60 %, nominal concentrations of 16.7, 167 and 1670 mg/l, respectively, were prepared. No chemical analysis of the test concentrations was conducted. The determination of the effect concentrations was based on the nominal concentrations, assuming the test item to be stable in water for the whole test period.

The median effect concentrations of the test item to Lemna minor with respect to growth rate (ErC50) and yield (EyC50) were estimated to be 100 -1000 mg/l and about 100 mg/l active ingredient, respectively and the no-observed-effect concentrations were 10 mg/l active ingredient (REACH&Colours Kft, 2015).

Therefore Acid Brown 348 can be considered as not toxic to Lemna minor for read across with similar substance 3.