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EC number: 224-957-0
CAS number: 4573-50-6
Readily biodegradable: 77% within 28 d (EU Method C.4-E, activated
There is one GLP study available investigating the ready
biodegradability of the test substance in an aerobic, aqueous medium,
according to the Council Directive 92/69/EEC Method C.4-E.
In a closed bottle test a nominal concentration of 2.5 mg/L test
substance was inoculated with 5 mL/L secondary effluent from a local,
domestic sewage treatment plant for 28 d under aerobic conditions in
completely full, closed bottles. A procedure and toxicity control as
well as an inoculum blank were run in parallel. Biodegradation was
followed by analysis of dissolved oxygen and was expressed as % of the
theoretical oxygen demand (ThOD).
The biodegradation of the test substance was 47%, 59%, 74% and 77%
after 7, 14, 21, and 28 d. Therefore, the test substance is classified
as readily biodegradable (77% within 28 d, 14-d window passed). The
toxicity control indicated that the test substance did not inhibit the
biodegradation of the reference substance.
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