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EC number: 219-417-6
CAS number: 2432-99-7
Biodegradation in water: Screening tests showed that 11-aminoundecanoic acid is readily biodegradable: 77 % (BOD) in 28 days, (OECD TG 301C)
Two studies on biodegradation of 11-aminoundecanoic acid in water
are available. The first study (i.e. Boutonnet and Thiébaut, 1994),
selected as the key study, has been performed according to OECD 301B
guideline (CO2 evolution test) and shows a maximum level of
biodegradation of 77% in 19 days. In the test conditions, no inhibitory
effect of 11-aminoundecanoic acid on the micro-organisms of the inoculum
nor physico-chemical degradation were observed. Among the 5 validity
criteria, 4 were fulfilled. The last one could not have been checked.
Based on these results, 11-Aminoundecanoic acid can be considered as
readily biodegradable. As the study is not BPL and one validity criteria
was not evaluated, the study is considered as reliable with restrictions.
The second study (i.e. Toray industrie, 1982) is considered as not
reliable because no guideline was followed, the test duration was
shorter than the one recommended in the OECD guidelines, the test
conditions and method were poorly described and the results were very
succintly reported. As the result of this study shows ready
biodegradability, it has been selected as supporting study.
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