Registration Dossier
Registration Dossier
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EC number: 242-538-0 | CAS number: 18727-04-3
Biodegradation in water: screening tests
Administrative data
Link to relevant study record(s)
Description of key information
readily biodegradable: 68% biodegradation after 28 days (oxygen consumption, OECD 301C) (cobalt citrate)
Key value for chemical safety assessment
- Biodegradation in water:
- readily biodegradable
Additional information
One study on the ready biodegradability is available for cobalt citrate (CAS 866-81-9). Within this key study conducted according to OECD 301C and GLP, 100 mg/L test substance (equivalent to a theoretical oxygen demand of 43.2 mg O2/L) was incubated with activated sludge as inoculum for 28 days (Muckle, 2012). As a result, 68% biodegradation was observed after 28 days, hence the pass level of 60% was achieved and the test substance can be considered as readily biodegradable.
Furthermore, the two constituents of cobalt hydrogencitrate could be regarded separately: the cobalt constituent is inorganic and therefore, biodegradation is not applicable. The citrate constituent is readily biodegradable, as has been shown in various test systems like e.g. OECD 301E, coupled units test, AFNOR or Sturm test.
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