Registration Dossier

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Additional information

Stability:

According to Kollig et al. (1993), Boethling & Mackay (2000) and Harris (1990), the test substance is generally resistant to hydrolysis because it does not contain any labile functional groups. Therefore, no study on hydrolysis is performed.

Biodegradation:

Two guideline-conform studies on biodegradation are available. The 1996 study on ready biodegradability via the manostatic respirometry method (OCED 301F) revealed only 9% degradation after 28 days, thus clearly failing the ready biodegradability criteria. The 1989 Zahn-Wellens-Test (OECD 302 B) revealed a degree of degradation of 70% after 28 days, indicating that the test item can be considered as inherently biodegradable.

Transport and distribution:

Study on adsorption/desorption waived based on estimated low log Kow of 1.48. Supporting Koc QSAR data derived from EPI Suite by the First Order Molecular Connectivity Index (log Koc = 1.42) and by the log Kow method (log Koc = 1.56) are very coherent. All available evidence therefore suggests that the substance can be classified as mobile in the environment. The higher of these two values of log Koc = 1.56 shall be used for chemical risk assessment.