Registration Dossier
Registration Dossier
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EC number: 224-169-7 | CAS number: 4223-03-4
Endpoint summary
Administrative data
Description of key information
Additional information
The biodegradation potential of the substance has been assessed in a prolonged Closed Bottle test according to OECD 301D (non-GLP and therefore reliability 2). The best results obtained showed biodegradation percentages of approximately 35% after 56 days. These results indicate that this substance is partially degradable and thus not readily biodegradable.
Prolongation of the test and testing under different conditions did not lead to higher percentages biodegradation. The branching of the tert-octyl chain of N-tert-octylacrylamide is probably the major reason for the recalcitrance to biodegradation in the test and the environment. Products formed upon hydrolysis i.e. acrylic acid and some isomers of tert-octylamine are probably biodegradable. The first reaction step (hydrolysis, possibly micro-organisms mediated) is therefore expected to be the rate limiting step. As the substance was found to be hydrolytically stable at pH 4, 7 and 9, further biodegradation testing in surface water, sediment and soil is not expected to provide additional information and was therefore not performed.
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