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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

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Administrative data

Link to relevant study record(s)

Description of key information

A GLP study was performed in accordance with OECD guideline 203, in order to assess the acute toxicity of 2,2,6,6-tetramethyl-4-oxopiperidinooxy to rainbow trout (Oncorhynchus mykiss).
The 96 hour LC50 was determined to be 89 mg ai/l, based on nominal concentrations. The No Observed Effect Concentration (NOEC) was 56 mg ai/L.

Key value for chemical safety assessment

Fresh water fish

Fresh water fish
Effect concentration:
89 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.