Registration Dossier
Registration Dossier
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EC number: 205-187-4 | CAS number: 135-37-5
Endpoint summary
Administrative data
Description of key information
Additional information
Stability
No data are available on hydrolysis of EDG. However, in Annex VIII column 2 of the REACH Regulation, it is suggested, that a study on the "Hydrolysis as function of pH" does not need to be conducted if the " substance is readily biodegradable". Therefore, a study on the "Hydrolysis as function of pH" does not have to be conducted for EDG.
Biodegradation
For EDG, one reliable guideline ready biodegradability test is available (van Ginkel, 2005 - closed bottle test), showing readily biodegradability.
Due to the structural comparability, studies with NTA have additionally been used to illustrate biodegradation potential.
The reported results demonstrate that NTA is readily biodegraded in all environmental compartments even at low environmental temperatures. Therefore, biodegradation can be considered to be an important removal process of NTA in soil, sediment, surface water, and treatment plants. For EDG a similar biodegradation rate and pattern is expected.
Bioaccumulation
No BCF data are available for EDG. However, in accordance with column 2 of REACH Annex IX, EDG has a calculated log octanol-water partition coefficient of - 8.27, is highly water-soluble, and is unlikely, due to its polar nature, to be taken up by fish gills or across other biological membranes.
This is further supported by the fact that secondary references are available for the structurally comparable NTA, which indicate that only a low accumulation of Na3NTA occurs in the hydrosphere.
Transport & distribution
For EDG a worst-case log Koc of 1 was calculated (Mensink, 2013, EPIWIN4.1, MCI method).
Additionally, the sorption characterictics of the structurally comparable trisodium nitrilotriacetate (Na3NTA) were determined in studies conducted by Dunlap et al. (1971), Bolton et al. (1993) & Baek & Clesceri (1986).
These results clearly indicate that the substance is not strongly adsorbed to soils and sediments.
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