EDDHA-FE6% Sodium ferric EDDHA-Agricultural Fertilizer High Quality, Bulk Supply, In Stock, Fast Lead Time

Sodium ferric EDDHA More Info

Sodium ferric EDDHA is a synthetic chelate complex with the CAS Registry Number 16455-61-1. Its molecular structure consists of a ferric iron ion (Fe³⁺) tightly bound by a hexadentate organic ligand known as EDDHA, which stands for ethylenediamine-N,N'-bis(2-hydroxy acid). This specific chelation creates a highly stable, water-soluble complex that is designed to remain intact in a wide range of soil conditions, particularly in alkaline (high pH) soils where iron normally becomes insoluble and unavailable to plants.

The primary function of this compound is to correct and prevent iron deficiency chlorosis in plants. In calcareous soils, iron readily oxidizes and precipitates as ferric hydroxide, a form that plant roots cannot absorb. The EDDHA ligand effectively competes with soil particles for the ferric ion, forming a soluble "shielded" package that can be transported in soil water. This complex is then recognized by specific mechanisms on plant root surfaces, allowing for the uptake of iron in a bioavailable form, which is essential for chlorophyll synthesis and overall plant vitality.

The application of sodium ferric EDDHA is predominantly within the agricultural and horticultural sectors, especially for high-value crops that are highly sensitive to iron deficiency. It is critically used for crops like citrus, grapes, peaches, and nut trees grown in alkaline soils, where iron chlorosis—characterized by interveinal yellowing of young leaves—is a common limitation to growth and yield. It is applied directly to the soil through irrigation systems or as a drench, ensuring the iron is delivered to the root zone where uptake occurs.

This chelate is commercially available as a reddish-brown to dark purple powder or as soluble granules. Its key technical characteristic is the isomeric purity of the EDDHA ligand; the ortho-ortho isomer is recognized as the most effective and stable form in alkaline conditions. The efficacy of a product is often determined by the percentage of this specific isomer, which directly influences its longevity and performance in the soil, providing a sustained release of iron over time.

From an environmental and regulatory perspective, sodium ferric EDDHA is considered a safe and targeted solution for micronutrient deficiency when used according to label directions. Its high specificity for resolving iron deficiency minimizes the need for excessive application, promoting sustainable agricultural practices. The compound's stability ensures that iron remains in a plant-available form rather than leaching into groundwater or forming insoluble precipitates, making it a highly efficient and reliable tool in modern crop management.

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