Registration Dossier
Registration Dossier
Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.
The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.
Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: 931-341-1 | CAS number: 68955-55-5
Biodegradation in water: screening tests
Administrative data
Link to relevant study record(s)
Description of key information
A number of studies are available that show C12-18 AO is readily biodegradable, both as a whole and the individual alkyl dimethylamine oxide constituents.
Key value for chemical safety assessment
- Biodegradation in water:
- readily biodegradable
Additional information
In the key study [Daniel M (2005)] the ready biodegradability of C12-18 AO was assessed according to ISO 14593 (CO2 headspace test) under GLP. 80 % degradation (based on inorganic carbon analysis) was observed after 28 days when the inoculum (domestic activated sludge) was treated with the substance at a measured concentration of 15.7 mg C/L. The substance reached 60 % degradation on day 3 hence meeting the 10 day window requirement for ready biodegradability. The reference substance, sodium benzoate, reached >60 % degradation in 14 days and a maximum level of 98 %. In a supporting study [van Ginkel (1990)] the ready biodegradability of the substance was assessed according to OECD TG 301 D Closed bottle test) under GLP. 82 % degradation (based on oxygen consumption) was observed after 28 days when the inoculum (domestic activated sludge) was treated with the substance at a concentration of 2 mg/L. The substance reached 11 % degradation on day 5 and 66 % on Day 15 hence meeting the 10 day window requirement for ready biodegradability. The reference substance, sodium acetate, reached 75 % degradation in 5 days and 87 % in 28 days.
Several studies where C12 -14 AO was tested to OECD TG 301 B [Clarke (2005)] [Casteel (2007)] [Hirschen (2001)], OECD TG 301 D [Balk & Hantink-De Rooij (1987)] or DIN 38 409 H 41 [Klein (1986)] are available. The substance was found to be readily biodegradable in all of these studies. Casteel (2007) also reports the results of OECD TG 301 B studies performed using the individual alkyl dimethylamine oxide constituents (from C10 -C16). Each of these constituents was found to be readily biodegradable, meeting the 10 day window.Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
