Registration Dossier

Data platform availability banner - registered substances factsheets

Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Currently viewing:

Administrative data

Link to relevant study record(s)

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

Fresh water invertebrates

Fresh water invertebrates
Effect concentration:
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.