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Ecotoxicological information

Short-term toxicity to aquatic invertebrates

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Description of key information

The test item was tested for toxicity to aquatic freshwater invertebrates in a 48 h-static test according to EU-method C.2 and OECD guideline 202. The EC50 was assessed at 54 mg/L.

Key value for chemical safety assessment

EC50/LC50 for freshwater invertebrates:
54 mg/L

Additional information

In this study the influence of 4 -Hydroxy TEMPO on invertebrates (Daphnia magna) was investigated according to EU-method C.2 and OECD guideline 202. Daphnids were exposed to the test item for 48 hours under static conditions. The following concentrations were tested in two tests, 40, 70, 120, 200, 350, 600 and 1000 mg/L in the first test and 6.1, 8.1, 14 and 26 mg/L in the second test. The 48 h EC50 value was determined as 54 mg/L and the 48 h NOEC was determined to be >= 26 mg/L.