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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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: 283-042-4 | CAS number: 84539-54-8
Endpoint summary
Administrative data
Description of key information
Additional information
According to REACH Regulation (EC) 1907/2006, Annex IX, Section 9.2.1.2, a study on abiotic degradation is required. Based on the structure of Fe(3Na)EDDHSA no hydrolysis is expected as no hydrolysable groups are present. The substance can thus be regarded as hydrolytically stable. This is supported by its application and use in aqueous solution. Furthermore, the read-across substance Fe(3K)EDDHSA was also found to be stable in water according to EU Method C.7 at pH 4, 7 and 9 (Groult, 2001). The half-life at 25 °C will be greater than 1 year.
Gómez-Gallego et al. (2005) investigated the photodegradation pathways and products of EDDHA, both as free acid and as complex with Fe3+. The chelating agent EDDHA is rather stable to photodegradation, only at extreme pH values (above or below pH 4 – 8, thus under non-typically environmental conditions), some photoreactivity is observed. Furthermore, the process requires UV-light, at visible light (λ > 313 nm) the photodegradation process is much slower. Different experiments show that Fe3+-EDDHA is very resistant to photochemical degradation.
The phototransformation in water was investigated with the read-across substance Fe(Na)EDDHMA according to the OECD Draft Guideline. The photochemical degradation was determined for the two major components (A and B), resulting in 40.66 and 35.4 hours, respectively at a temperature of 25 +/-3 °C with an light intensity of 4.86E20 photons/second in the wavelength range of 290 - 500 nm (Notox B.V., 1996).
Also the photostability in water of EDDHA/Fe3+ was investigated experimentally as well as the impact on soybean growth by the degradation products
(Hernández-Apaolaza and Lucena, 2010). As result, the chelate was progressively degraded along the 30 day period when it was exposed to direct sunlight. The degradation products (Salicyladehide, salicyclic acid and Salicylaldehydeethylenediamine diimine) did not affect biomass production in soybean plants.
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.
