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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

A GLP study was performed to assess the acute toxicity of 2,2,6,6,-tetramethyl-4-oxopiperidinooxy to Daphnia Magna in accordance with OECD 202, the test was run for a period of 48 hours under static test conditions. The numbers of immobilised Daphnia were recorded after 24 and 48 hours. 
From the study results the 48 hour EC50 for the test material was determined to be 74mg ai/L , based on nominal test concentrations. The No Observed Effect Concentration was 32 mg ai/L.

Key value for chemical safety assessment

Fresh water invertebrates

Fresh water invertebrates
Effect concentration:
74 mg/L

Additional information

A reliability rating of 1 was assigned to the key study, according to the criteria of Klimisch, 1997 as the study was conducted in accordance with recognised guidelines and GLP.