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Regarding aquatic toxicity of the test item, the toxicity to Daphnia, algae, fish and micro-organisms was assessed.

There is one study available on the short-term toxicity of the test item to Daphnia in an acute immobilisation test according to OECD 202. The study is performed according to GLP.

The test substance (24 mg/L) is assessed for 48 hours. The immobilisation of the Daphnia was assessed at the end of the study period. The EC 0 was determined.

No effect on the immobilisation was found. The EC0 for 48 hours was found to be ≥ 26.3 mg/L.

The toxicity of the test item to green algae was assessed according to OECD 201. Algae were exposed for 72h to increasing test substance concentrations (nominal concentrations ranging from 0 to 50 mg/L). As the test item concentration decreased in time, the time-weighed average concentrations were used to express the EC, NOEC and LOEC values. The test item was found to inhibit growth of algae. Based on growth rate, the EC50 was found to be 0.440 mg/L and NOEC 0.101 mg/L.

The toxicity to fish was assessed according to OECD 203, in a semi-static limit test at a nominal concentration of 1.5 mg/L. The Zebrafish were exposed for 96h, and the test solution was refreshed daily. As the concentration decreased more than 20% compared to the nominal concentration, measured concentrations expressed as geometric mean were used to calculate effect levels. No mortality was observed at the limit concentration. The LC0 = 1.01 mg/L; the LC50 and LC100 are > 1.01 mg/L (geometric mean).

Based on the toxicity control results available from ready biodegradation studies, the test substance was found to have no inhibitory effect on microorganisms at a concentration of 100 mg/L.

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