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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Toxicity to microorganisms

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Administrative data

Link to relevant study record(s)

Description of key information

A GLP study was performed to assess the effect of 2,2,6,6,-tetramethyl-4-oxopiperidinooxy on the respiration of activated sewage sludge. The study was performed in accordance with OECD guideline 209. 
No significant effect on the respiration of activated sewage sludge organisms was observed therefore the 3-hour EC50 was defined to be greater than 1000mg ai/l.

Key value for chemical safety assessment

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.