Registration Dossier
Registration Dossier
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EC number: 946-245-5 | CAS number: -
Biodegradation in water: screening tests
Administrative data
Link to relevant study record(s)
Description of key information
Substance cannot be classified as readily biodegradable as it shows 0% degradation after 28 days in an OECD TG 301D test.
Key value for chemical safety assessment
- Biodegradation in water:
- not biodegradable
- Type of water:
- freshwater
Additional information
In one study conducted in compliance with GLP and according to OECD 301D Closed Bottle Test), secondary activated sludge from a waste water treatment plant receiving predominantly domestic waste water was exposed to 2 mg/L of the substance for 28 days. After 28 days 0% the substance was biodegraded (as O2 consumption). When the study was prolonged to 60 days 7% the substance was biodegraded. The substance can therefore not be classified as readily biodegradable. In a follow-up study, the biodegradation of the substance was tested using an enhanced Closed Bottle Test (OECD 301D) in which the inoculum was acclimatised using a semi-continuous activated sludge (SCAS) unit according to OECD 302A (Inherent biodegradability, modified SCAS test). In this study biodegradation did not exceed 20% after 42 days exposure to adapted activated sludge (25% at 60 days). Based on these findings the substance cannot be considered as inherently biodegradable.
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