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Short-term toxicity to aquatic invertebrates

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Description of key information

The acute toxicity of benzyldimethylamine to aquatic invertebrates (Daphnia magna) was tested according to EU method C.2 'Acute Toxicity for Daphnia' (2008). No toxic effects against Daphnia magna were observed during 48 hours exposure at a limit test concentration of 100 mg/L (Currenta, 2010).

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Additional information

A study was performed to assess the acute toxicity of benzyldimethylamine to Daphnia magna STRAUS under static conditions in a closed bottle system. The study was conducted in accordance with the Council Regulation (EC) No 440/2008, Method C.2 ‘Acute toxicity for Daphnia’ (2008) which is equivalent to OECD Guideline for Testing of Chemicals No. 202 'Daphnia sp., Acute Immobilisation Test' (adopted April 13, 2004). The Daphnia were exposed to a range of concentrations, nominally 6.25, 12.5, 25, 50 and 100 mg/L of benzyldimethylamine dissolved in dilution water.Observations were made on the swimming ability and the immobilisation rate, respectively, after 24 and 48 hours of exposure. The following values were determined:

EC 50 (24,48 h) > 100 mg/L

The results are expressed in terms of nominal concentrations (at 24 h and 48 h). Effective concentrations ranged from 97.6 – 99.5% of nominal values at 0 hours, and from 94.9 – 95.9% of nominal values at 48 hours, respectively. The hardness of the dilution water used was 14.7°dH (= 262.4 mg/L CaCO3).