Registration Dossier
Registration Dossier
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EC number: 905-898-6 | CAS number: -
Biodegradation in water: screening tests
Administrative data
Link to relevant study record(s)
Description of key information
The major constituent 2,2',2''-nitrilotriethanol is rapidly biodegradable based on studies performed by West (1996) and Gerike (1978). The second largest constituent has also been found readily biodegradable.
Key value for chemical safety assessment
- Biodegradation in water:
- readily biodegradable
Additional information
As key study regarding the biodegradation of 2,2',2''-nitrilotriethanol a test performed by West et al. (1996) is identified. In a test with activated sludge biodegradation half-lifes between 0.01 and 0.51 days and mineralization half-lifes between 0.24 and 0.67 days were found, depending on the initial concentration of the test substance (164 and 818 mg/L) and the concentration of the activated sludge (0.6 and 5.7 mg/L MLSS).
These results indicate, that 2,2’,2’’-nitrilotriethanol is readily biodegradable. A ready test performed by Gerike (1978) according to a precursor of the Modified OECD Screeening Test (OECD TG 301 E) using non-adapted effluent from a waste water treatment plant as inoculum supports these results.As indicated by a manometric respirometry test (OECD 301 F) following GLP, DEA is readily biodegradable since the substance was degraded by 93 % after 28 days related to BOD.
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