Iron is a trace element but very essential for plants that is involved in many physiological and biochemical processes of plants such as respiration, photosynthesis, chlorophyll production and regulation of enzyme activity. Jaundice of young leaves is one of the most important symptoms of iron deficiency. In case of severe deficiency, severe leaf fall will occur. EDDHA chelating base in this compound with low molecular weight and high structural stability, has the highest possible amount of ortho-ortho isomer and is completely soluble in water. This chelating agent is a very desirable alkaline soil in Iran and is stable up to pH 11 and is a very environmentally healthy compound.