Registration Dossier
Registration Dossier
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EC number: 270-128-1 | CAS number: 68411-46-1
Biodegradation in water: screening tests
Administrative data
Link to relevant study record(s)
Description of key information
If released into water, the UVCB substance can be expected to be poorly biodegradable.
Key value for chemical safety assessment
- Biodegradation in water:
- under test conditions no biodegradation observed
Additional information
In a ready biodegradability test with the UVCB substance (CAS 68411 -46 -1) following OECD guideline 301B, no significant biodegradation was observed. 1% degradation after 28 days was reported in this GLP study (Ciba-Geigy 1988). Initial test substance concentrations were 10.6 and 20.1 mg/L. The study was therefore performed at concentrations exceeding the water solubility. Thus, most of the test material used in the test was not accessible for biodegrading processes. Biodegradation of about 1% after 28 days was reported.
Overall, although biodegradation is expected to occur in the water-soluble fraction, the biodegradation rate is expected to be too small to go below the persistency criteria.
Therefore, the UVCB substance is assumed to be poorly biodegradable.
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