Registration Dossier
Registration Dossier
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EC number: 281-692-3 | CAS number: 84012-52-2
Toxicity to aquatic plants other than algae
Administrative data
Link to relevant study record(s)
Description of key information
ErC50 (7d, nominal a.i.) = 17.1 mg/l
Key value for chemical safety assessment
- EC50 for freshwater plants:
- 17.1 mg/L
- EC10 or NOEC for freshwater plants:
- 0.977 mg/L
Additional information
No information on the "toxicity to aquatic plants other than algae" is availale for Target Substance. However data available on Similar Substance 01 has been used for the assessment. More details about the substance similarity are reported in section 13.
The inhibitory effects of test item to the duckweed Lemna minor were investigated over a period of 7 days, based on the frond number and biomass (dry weight), following the guideline OECD 221.
The test was performed at of 400, 50.0, 25.0, 6.25, 1.56, 0.391 mg/l nominal concentrations of test item, corresponding to 350, 43.7, 21.9, 5.47, 1.37, 0.342 mg/l of the active ingredient.
The test concentrations of test item during the 7 day test period were determined by dissolved organic carbon (DOC) analysis at the beginning of the test, as well as after 3, 5 and 7 days of exposure.
After 7 days of exposure the following results are available:
| Nominal concentration of A.I (mg/l) | EC50 | EC10 | NOEC |
| Frond Number, Growth Rate | 17.1 | 0.98 | <0.391 |
| Frond Number, Yield | 4.62 | 0.28 | <0.391 |
| Dry Weight, Growth Rate | 6.88 | 1.12 | 1.56 |
| Dry Weight, Yield | 2.87 | 0.39 | 0.391 |
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