Registration Dossier
Registration Dossier
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EC number: 262-679-1 | CAS number: 61260-55-7
Biodegradation in water: screening tests
Administrative data
Link to relevant study record(s)
Description of key information
Poorly biodegradable
Key value for chemical safety assessment
- Biodegradation in water:
- under test conditions no biodegradation observed
Additional information
The ready biodegradability of the substance was tested in a study performed according to Directve 84/449/EEC C.5 using activated domestic sludge as inoculum. Degradation was tested at a substance concentration of 11.2 and 21.7 mg/L respectively. At test termination after 28 days the substance was degraded by 3% at both test concentrations (Ciba-Geigy Ltd., 1992a). Thus, the substance is not readily biodegradable according to OECD criteria. This assumption is supported by two further studies. A second test perfomed in compliance with EC-guideline 84/449/EEC C5 detected a biodegradation rate of 23% based on CO2 evolution (Study director 1993b). In a study according to Directive 79/831/EEC, Annex V, part C.4-A DOC removal was measured and a degradation rate of 13% was determined (Study director 1993a).
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