Registration Dossier
Registration Dossier
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EC number: 938-774-5 | CAS number: 85408-49-7
Endpoint summary
Administrative data
Description of key information
Additional information
No biodegradation studies have been performed on C12 -16 amine oxide. Data are available for C12-14 AO and C12-18 AO, as well as on the individual component chain lengths. The data on these analogue substances can be read across to C12-16 AO on the basis that the chemical structures are identical and the chainlength distributions covers those present in the C12-16 AO.
C12-14 AO was readily biodegradable in a number of studies performed to OECD TG 301B or D. Similar results were obtained for C12-18 AO in studies performed to ISO 14593 and OECD TG 301D and for the individual alkyl dimethylamine oxide constituents (from C10-16) in studies performed to OECD TG 301B. Based on these studies it is concluded that amine oxides, including C12 -16 AO are readily biodegradable.
In a continuous activated sludge (CAS) test performed using C12 -14 AO, removal of parent amine oxide was > 99.8 % in both units. In a monitoring study, the influent and effluent concentrations of C12 and C14 amine oxide was measured in six municipal sewage treatment plants. The BOD removal was 96-98 %. On the basis of these studies, a removal rate in STP of 98 % is proposed for modelling.
In a river water die away study performed using C12 -14 AO the half-life of amine oxide was determined to be 3.2 days. In a biodegradation test performed using anaerobic digester sludge the rate constant for mineralization of C12 -14 amine oxide was 1.32/day. The results of these studies are read across to C12 -16 AO on the basis of the equivalence in chemical structure.
Based on these studies, performed under both aerobic and anaerobic conditions, it is concluded that amine oxides, including C12 -16 AO will be rapidly degraded in the environment, both in the aquatic environment and in soil and sediment.
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