Registration Dossier

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Additional information

The log Koc for bis(4-tert-butylcyclohexyl) peroxydicarbonate was estimated by means of QSAR (KOCWIN v2.00) since experimental determination using the screening test is not feasible (substance decomposes in HPLC equipment).

The predicted value, based on the log Kow is log Koc = 5.0796, whereas the log Koc based on MCI was estimated to be 4.14. The higher value is used in the risk assessment of the substance in a worst case approach. Accordingly, the Koc is calculated to be 120100.

Log Koc values > 4 indicate strong adsorption tendency to soil particles. Estimated values are essential for substances for which experimental measurement is not feasible i.e. for difficult substances like bis(4-tert-butylcyclohexyl) peroxydicarbonate, which decomposes in the analytical system (HPLC).

Any other distribution data are not required for the registered tonnage band and the substance's risk profile.