Registration Dossier
Registration Dossier
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EC number: 946-789-3 | CAS number: -
Endpoint summary
Administrative data
Description of key information
EC50 (48h) invertebrate Daphnia: 103 mg/L
ErC50 (7d) aquatic plants Lemna minor: 313 mg/L (frond number)
ErC50 (7d) aquatic plants Lemna minor: 55.2 mg/L (dry weight)
NOrEC (7d) aquatic plants Lemna minor: 9.55 mg/L (frond number)
NOrEC (7d) aquatic plants Lemna minor: 3.02 mg/L (dry weight)
Additional information
Invertebrate acute toxicity
The median effect concentration (EC50) and the no-effect concentration (NOEC) of the substance to Daphnia magna were investigated under static exposure conditions over a period of 48 h, following the guideline OECD 202 and EU C.2.
The investigated concentrations were 300, 136, 62.0, 28.2 and 12.8 mg/L loading rate of the test item, corresponding to 219, 99.8, 45.3, 20.6 and 9.37 mg/L of the active ingredient (iron complex, sodium salt).
The EC50 Daphnia magna at 24h was found to be 103 mg/L, the EC50 Daphnia magna at 48h was found to be 103 mg/L based on based on the nominal concentrations of the active ingredient.
Aquatic Plants toxicity
The inhibitory effects of the substance 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 and the EU C.26, in SIDS medium.
The test was performed at 500, 158, 50.0, 15.8 and 5.00 mg/L nominal concentration, corresponding to 302, 95.5, 30.2, 9.55 and 3.02 mg/L, respectively, of the active ingredient (iron complexes, sodium salt).
Analyses showed that the concentrations of the test item were maintained satisfactorily over the whole 7-day test period and remained within 80-120% of the nominal concentrations. Therefore, the effective concentrations (ErC50and EyC50) were assessed based on the nominal concentrations of the active ingredient.
Frond number, growth rate inhibition ErC50 was calculated to be 313 mg/L.
Dry weight, growth rate inhibitio, ErC50 was calculated to be 55.2 mg/L.
NOErC, frond number, growth rate was determined to be 9.55 mg/L.
NOErC, dry weight, growth rate was determined to be 3.02 mg/L.
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