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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

No inhibition of respiration rate of non-adapted activated sludge was observed at 20 mg/L of n-butyl-4,4 -bis(tert-butylperoxy)valerate according to OECD 209 guideline.

Key value for chemical safety assessment

Additional information

The acute toxicity of n-butyl-4,4 -bis(tert-butylperoxy)valerate was tested using OECD guideline 209 under GLP conditions (L'Haridon, 2000). No toxic effects were observed at the highest tested concentration of 20mg/L nominal which means that 3h-EC10 and EC50 are > 20 mg/L.