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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

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Environmental fate & pathways

Adsorption / desorption

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Description of key information

Log Koc of cyclohexylidenebis[tert-amyl] peroxide has been determined to be 4.62

Key value for chemical safety assessment

Koc at 20 °C:
41 687

Additional information

The adsorption/desorption behaviour of 1,1-di(tert-amylperoxy)cyclohexane on soil and sewage sludge was evaluated in a study performed in accordance with OECD TG 121 and GLP requirements (Chastenet, 2017).

The test system consisted of a mass spectrometer fitted with a time of fly mass analyzer and a UV spectrometer placed in series.

Three determinations are performed and the value retained for log Koc of the test item is the mean of the three values obtained.

During the analysis, the temperature was 30°C and the pH value was 6.7.

The average Log Koc of 1,1 -di(tert-amylperoxy)cyclohexane has been determined to be 4.62.

The definitive test met all the validity criteria.

[LogKoc: 4.62]