Registration Dossier
Registration Dossier
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EC number: 224-809-5 | CAS number: 4500-29-2
Biodegradation in water: screening tests
Administrative data
Link to relevant study record(s)
Description of key information
In an enhanced OECD301B study the registration substance (17 mg/L; 10.8 mg C/L) reached the required level of 60% degradation to be ultimately biodegradable within 43 days using a non-adapted municipal activated sludge. Continuous degradation could be observed starting at day 6 reaching a maximum of 91% degradation on day 60. The only enhancement was the prolongation to 60 days.
In a standard OECD 301B CO2 EvolutionTest using a non-adapted municipal activated sludg the registration substance (10 mg/L) was not readily biodegradable, but a continuous degradation starting at day 9 could be observed reaching a maximum degradation of 24% after 28 days.
Under the test conditions of an OECD 302B Zahn-Wellens Test the registration substance was not inherently biodegradable.
Assessing the whole set of information the substance is not readily biodegradable and did not reach the required pass level in a study on inherent biodegradation, but a continuous degradation could be observed in the two existing studies on ready biodegradability. The substance reached the pass level of 60% degradation after 43 days and a maximum degradation of 91% on day 60. The substance is therefore ultimately biodegradable within 43 days.
Key value for chemical safety assessment
- Biodegradation in water:
- under test conditions no biodegradation observed
- Type of water:
- freshwater
Additional information
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