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Ecotoxicological information

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Concerning the acute toxicity towards aquatic invertebrates, an EC50 of 4.5 mg/L was obtained. The study was conducted under static conditions according to Directive 92/69/EEC, C.2 which is in most parts equivalent to the OECD Guideline No. 202. Daphnia magna was exposed to 6 concentrations of the substance for a period of 48 hours. The result is expressed in terms of nominal concentrations, as the test concentrations were confirmed by analytical monitoring. Deviation from the nominal concentrations was less than 20 %.

Toxicity of the substance to algae was assessed in a study conducted in accordance with Commission Regulation (EC) No 761/2009 amending Regulation No 440/2008, Method C.3 ‘Freshwater Alga and Cyanobacteria, Growth inhibition test’ (2009) which is equivalent to OECD Guideline for Testing of Chemicals No. 201 (2006).

Desmodesmus subspicatus was exposed to 7 concentrations of the test substance for a period of 72 h under static conditions. An EC10 of 0.207 mg/L and an EC50 of 0.998 mg/L were obtained in this study. The results are expressed in terms of geometric mean measured concentrations. Effective concentrations ranged from 95.7 % to 97.5 % of nominal values at 0 hours, and from 3.5 % to 61.1 % of nominal values at 72 hours. This toxicity study is classified as acceptable and satisfies the guideline requirements for the algae study.