Registration Dossier

Diss Factsheets

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Based on the key biodegradation studies, the registered substance is considered readily biodegradable (Wildlife International, 2000) and is considered almost totally removed from a WasteWater Treatment Plants (WWTP) (99.9% of removal; Weston, 1995). As the substance is readily biodegradable, no further assessment of the stability of this compound is necessary (e.g. hydrolysis study).

The adsorption coefficient (Koc) of the registered substance was estimated with three calculation methodologies using the experimental log Kow value of 5.52: MCI method from KocWin v2.00 (EPI Suite v4.1), log Kow method from KocWin v2.00 (EPI Suite v4.1) and TGD equation. The retained value is a geometric mean of these results, corresponding to a log Koc at 4.18 (Koc = 15094 L/kg). This result indicates that the substance is immobile in soil (according to P.J. McCall et al., 1980).

Considering the sensitivity analysis of log Koc on PEC and RCR, the expected likely variation interval of an experimental log Koc determination and that the risk would remain acceptable, it is not deemed relevant to perform any experimental study (see attached report for details).

Additional information