Registration Dossier
Registration Dossier
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EC number: - | CAS number: -
Biodegradation in water: screening tests
Administrative data
Link to relevant study record(s)
Description of key information
In a 28-day biodegradability study, microorganisms in activated sludge were exposed to B508 at nominal concentrations of 0 (Blank control and positive control) and 100 mg/L (nominal concentration).
The criterion for ready biodegradability (at least 60% biodegradation within a 10-day window) was not met since only 21 % (in average) of the test substance was biodegraded after 28 days. Therefore, B508 is classified as not readily biodegradable. However, the fact that under the stringent conditions of the ready biodegradability test a biodegradation of >20% was achieved indicates that under more favourable conditions the substance may degrade more rapidly.
Results of specific analysis revealed that the hydrogenated rosins biodegraded 92% whereas the CuPc-SA or CuPc compounds did not biodegrade.
Key value for chemical safety assessment
Additional information
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