The chelates of iron based on EDDHSA are being widely used since15 years ago in the correction of the ferric chlorosis on the Spanish market and in all these years they have showed a magnificent efficiency, providing very satisfactory results to field level. Also it has great penetration other Mediterranean countries (Italy, France, etc.).

As for it chemical formula, the fundamental difference of the EDDHSA is the presence of the groups called "sulphonic" (SO₃), which, due to the fact that they remain always in the same position (position "for"), they allow that 100 % of the iron always should be in it more effective position: "ortho-ortho"

At the same time, these groups allow that the chelate EDDHSA should be about 3 times more soluble than those of the type EDDHA and EDDHMA.

This higher solubility implies two things:
- The product has a better management
- The iron is more soluble in the soil, so it is more available for the plant, which can realize a faster take up.

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