1170-02-1Relevant articles and documents
Chemical stability of the fertilizer chelates fe-eddha and fe-eddhsa over time
Hoffmann, Józef,Hoffmann, Krystyna,Huculak-Maczka, Marta,Klem-Marciniak, Ewelina,Marecka, Kinga
, (2021)
In application conditions, the influence of environmental parameters on used fertilizer chelates and their distribution over time is important. For this purpose, the changes in the content of micronutrient ions and Fe-EDDHA and Fe-EDDHSA chelates in an aq
Structure and fertilizer properties of byproducts formed in the synthesis of EDDHA
Hernandez-Apaolaza, Lourdes,Garcia-Marco, Sonia,Nadal, Paloma,Lucena, Juan J.,Sierra, Miguel A.,Gomez-Gallego, Mar,Ramirez-Lopez, Pedro,Escudero, Rosa
, p. 4355 - 4363 (2007/10/03)
The synthesis of commercial EDDHA produces o,o-EDDHA as the main reaction product, together with a mixture of regioisomers (o,p-EDDHA and p,p-EDDHA) and other unknown byproducts also able to complex Fe3+. These compounds have been obtained by direct synthesis, and their structures have been determined by ESI-MS analysis as oligomeric EDDHA-like products, formed by polysubstitution in the phenolic rings. Short-term experiments show that the iron complexes of samples enriched in these oligomeric byproducts have adequate stability in solution, but a significant amount of them is lost after interaction with soils and soil materials. Mildly chlorotic cucumber plants are able to reduce iron better from o,p-EDDHA/Fe3+ than from the iron complexes of the oligomeric byproducts. In hydroponics, the chlorotic soybean susceptible plants have a lower potential for Fe absorption from these byproducts than from o,o-EDDHA/Fe3+ and from o,p-EDDHA/Fe 3+. In the studied conditions, the iron chelates of EDDHA byproducts do not have the long-lasting effect shown by o,o-EDDHA/Fe3+ and present a less efficient fast-action effect than the o,p-EDDHA/Fe3+.