Registration Dossier
Registration Dossier
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EC number: 276-538-7 | CAS number: 72252-58-5
Toxicity to aquatic plants other than algae
Administrative data
Link to relevant study record(s)
Description of key information
The inhibitory effect of the test item on the growth of the freshwater aquatic plant Lemna gibba was determined according to OECD guideline 221. Cultures of Lemna gibbawere exposed in a semi-static test to the test item concentrations 100, 32, 10, 3.2 and 1.0 mg/L. The inhibition of growth in relation to control cultures was determined over a test period of 7 days.
This study encompassed 6 treatment groups (5 dose rates of the test item and a control) with three replicates per test concentration and control. At test start 12 fronds were introduced in each replicate. Beside other parameters growth rates based on frond numbers were determined. The following results were reported:
EC50 (7 d) > 100 mg/L
EC20 (7 d) = 17.1 mg/L
EC10 (7 d) = 3.14 mg/L
NOEC (7 d) = 1.0 mg/L
Key value for chemical safety assessment
Additional information
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