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Ecotoxicological information

Short-term toxicity to aquatic invertebrates

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Description of key information

Daphnia were exposed to a limit test concentration of nominally 0.22 mg/L of Acemetacin-tert. butylester dissolved in water. No toxic effects against daphnia were observed at the limit of water solubility under exposure conditions.

Key value for chemical safety assessment

Additional information

Because of the low solubility of the test item, a limit test at the limit of water solubility under test conditions was performed in order to demonstrate that the EC 50 is greater than this concentration. The EC 50 is the concentration which immobilises 50% of a test batch of Daphnia within a continuous 48 hour period of exposure.