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EC number: 407-000-3 | CAS number: 127519-17-9 CGL 384; TINUVIN 384
Biodegradation in water and sediment: simulation tests
Administrative data
Link to relevant study record(s)
Description of key information
The primary degradation of the test substance from water and sediment goes rapidly.
Key value for chemical safety assessment
Additional information
The degradation in water / sediment systems was investigated under aerobic and anaerobic conditions, in accordance to OECD 308.
Under aerobe conditions the substance migrated rapidly from the water phase into the sediment, with a half-life of about a day. In the sediment a mean half-life of about 8 days was calculated.
Several degradation products were determined. The main degradation product resulted from ester hydrolysis of the substance to carbonic acid. The carbonic acid amounted to concentrations of about 60% of the applied radioactivity and disappeared with a half-life of about 40-64 days from the total river and pond test system.
The mineralization of the test item was low (approx. 1%) and organic volatile compounds were not formed. A part of the test item got stably bound to the immobile humin fraction.
The major degradation pathway of the test item was the incorporation of the degradation products into the organic matter.
Under anaerobe conditions similar results occur. The parent compound disappeared rapidly from the aquatic systems (half-life of 20.4 days) to form carbonic acid and bound residues. Like under aerobic conditions the mineralization was insignificant low.
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