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Short-term toxicity to aquatic invertebrates

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Two guideline studies on the toxicity of octocrilene to Daphnia magna are available. Due to the low solubility of the test substance the studies were performed with an eluate of octocrilene. A guideline study following OECD 202 detected an EC50 >0.023 mg/l. The EC50 value is equivalent to the measured saturation concentration of octocrilene (Symrise GmbH & Co. KG, 2001). In a second study performed according to OECD guideline 202 an effective concentration > 100 mg/l based on the nominal concentration was reported (BASF AG, 2000).