Registration Dossier
Registration Dossier
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EC number: 239-741-1 | CAS number: 15667-10-4
Biodegradation in water: screening tests
Administrative data
Link to relevant study record(s)
Description of key information
There is no test performed with cyclohexylidenebis[tert-amyl] peroxide. Ready biodegradability of this substance is read-across from data obtained with cyclohexylidenebis[tert-butyl] peroxide: the peroxide was not biodegraded in the 28 -day modified Sturm test and should therefore not be classified as readily biodegradable.
Key value for chemical safety assessment
- Biodegradation in water:
- under test conditions no biodegradation observed
Additional information
There is no test performed with cyclohexylidenebis[tert-amyl] peroxide. Ready biodegradability of this substance is read-across from data obtained with cyclohexylidenebis[tert-butyl] peroxide.
The ready biodegradability of cyclohexylidenebis[tert-butyl] peroxide was evaluated using a 28 -day modified Sturm test according to EU method C.4 -C and OECD guideline no. 301 B.
The flasks of the test item obtained a peroxide concentration of 10 mg/L of TOC and inoculum. The inoculum consisted of sewage sludge sampled from the aeration tank of a sewage treatment plant and was aerated for 7 days. Inoculum concentration was 12.0 mg/L (dry weight) in all test vessels. CO2 scrubbed air was bubbled through the flasks for the 28 day test period.
The biodegradation of cyclohexylidenebis[tert-butyl] peroxide totaled 5 % at the end of the test. Therefore, cyclohexylidenebis[tert-butyl] peroxide was considered as not readily biodegradable in the 28 -day modified Sturm test.
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