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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Ecotoxicological information

Short-term toxicity to aquatic invertebrates

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Administrative data

Link to relevant study record(s)

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.