Registration Dossier
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EC number: 232-452-1 | CAS number: 8031-44-5
Short-term toxicity to aquatic invertebrates
Administrative data
Link to relevant study record(s)
Description of key information
EC50 (48 h) > 1.1 mg/l (measured geometric mean)
EC50 (48 h) > 100 mg/l (nominal)
No toxic effects were observed up to the solubility of the substance
Key value for chemical safety assessment
Fresh water invertebrates
Fresh water invertebrates
- Effect concentration:
- 1.1 mg/L
Additional information
The acute toxicity of the substance to the water flea Daphnia magna was investigated in a limit test according to the guideline OECD 202 and EU C.2, under static exposure conditions over a period of 48 h. The test solutions were prepared through 96-h stirring followed by filtration. The single investigated loading rate was 100 mg/l. 40 individual Daphnia divided into 2 test vessels were exposed to the test concentration, and 60 Daphnia divided into 3 test vessels were used as blank controls (daphnia medium).
The concentrations of the substance in the test solutions were determined by DOC analysis at the beginning and after 24 and 48 h of exposure. These analyses confirmed the very low solubility of the test item and showed that the test concentrations were not within 80-120 % of the nominal loading rate. Therefore, the effect concentrations were assessed based on the geometric mean of the measured concentrations.
No significant effects (≤ 10 % immobilization) were observed at 100 mg/l loading rate or in the blank controls, neither after 24 h of exposure nor after 48 h.
EC50 (48h) > 1.1 mg/l (measured)
NOEC (48h) > 1.1 mg/l (measured)
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