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Long-term toxicity to aquatic invertebrates

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Description of key information

4-Hydroxy TEMPO was tested for reproductive toxicity to Daphnia in a 21 day semistatic test according to OECD guideline 202 Part II which was in accordance to the EU draft method C.20. The NOEC was determined at 1.5 mg/L and the LOEC at 4.5 mg/L.

Key value for chemical safety assessment

Fresh water invertebrates

Fresh water invertebrates
Effect concentration:
1.5 mg/L

Additional information

The chronic toxicity of 4 -Hydroxy TEMPO to invertebrates (Daphnia magna) was investigated according to EU-method C.20 and OECD guideline 202. Daphnids were exposed to the test item for 21 days under semi-static conditions. The following concentrations were tested 0.5, 1.5, 4.5, 13.5, 40 mg/L. The NOEC was determined to be 1.5 mg/L and the LOEC was determined to be 4.5 mg/L.