Registration Dossier
Registration Dossier
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EC number: 219-983-4 | CAS number: 2591-76-6
Endpoint summary
Administrative data
Description of key information
Additional information
Biodegradation
Readily Biodegradability:
In a study the biological oxygen demand within 5 days (BOD5) was
determined for the test substance (BASF1989). A ratio of BOD5 and COD <
1% was estimated. Based on this result, the test substance is not
considered to be readily biodegradable.
Inherently Biodegradability:
The inherent biodegradability of the test substance was investigated
in a study equivalent or similar to OECD 301B , Zahn-Wellens-test (BASF
1998, 2-63-7/89). During the test period of 28 days practically no
biodegradation of the test substance was observed (DOC removal: 5 %).
Adsorption/desorption
The soil adsorption coefficient (Koc) was calculated using EPIsuite KOCWIN program. Using the molecular connectivity index (MCI) method, the Koc was calculated to be 16.08 L/kg and log Koc to be 1.2 respectively. Using the Kow method, the Koc was calculated to be 50.49 L/kg and Log Koc to be 1.7 respectively. The different calculation models show a good consistence. The calculated log Koc using the log Kow method was regarded as most reliable because this value was based on a measured log Pow of the substance. The Koc of 50.49 L/Kg was regarded as worst case assumption and therefore chosen as key value for chemical safety assessment (if required). Thus, adsorption to solid soil phase is not expected (log Koc < 3).
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