Diego74 ha scritto:HBED

HBED, short for N,N’ – di (2-hydroxybenzyl) ethylenediamine – N,N’ – diacetic acid, is a chelate that protects its nutrient against precipitation up to a very high pH of 12. The stability constant of HBED is even higher than the constant of EDDHA chelate with the highest ortho-ortho percentage. As the HBED chelate has no isomers (unlike EDDHA), the stability constant is always high and doesn’t depend on the ortho-ortho percentage, which is difficult to analyse. Furthermore, HBED has a limited affinity with copper. This means that the risk of copper accumulation is small. Finally, HBED is highly resistant to UV-light. As a result, its molecule structure and properties stay intact.