Registration Dossier
Registration Dossier
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EC number: 219-169-9 | CAS number: 2379-81-9
Biodegradation in water: screening tests
Administrative data
Link to relevant study record(s)
Description of key information
Not readily biodegradable
Key value for chemical safety assessment
Additional information
Inherent biodegradability
The inherent biodegradability was determined according to the MITI II test. Only short abstract is available. The bioelimination after 24 days was 0 %.
BOD5/COD ratio
Biochemical Oxygen Demand (BOD5) and Chemical Oxygen Demand (COD) are the most commonly used parameters for the characterization of the biodegradability capacity.
COD results are typically higher than BOD5 values, and the ratio between vary depending on the characteristics of the substrate. This ratio has been commonly used as an indicator for biodegradation capacity, the "Biodegradability index" (B.I.).
As indicated in ECHA Guidance requirement R.7B, the BOD5 test is a traditional biodegradation test that is now replaced by the ready biodegradability tests. Therefore, this test should not be performed today for assessment of the ready biodegradability of substances.
Older test data may, however, be used when no other degradability data are available.
Studies on BOD5 and COD are available for this substance, therefore they have been used together with the inherent biodegradability , in the weight of evidence approach for this substance.
Details of the method have been not reported as only short abstract is available. The COD measured was 1927 mg/g O2 while the BOD5 was 0 mg/g O2.
As reported in the ECHA Guidance R7.b, a substance is considered as readily biodegradable if BOD5/COD > = 0.5. The ratio BOD5/COD for the test item is 0.0, therefore the substance is considered as not readily biodegradable
This result is in line with the BOD5/COD values calculated in other tests reported in the file attached below.
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