Eddha Series Eddha Iron Chelate
EDDHA is a chelate that protects Iron against precipitation up to a pH of 9. The stability constant of the Iron-EDDHA depends on the isomer composition. The higher the percentage of ortho-ortho in comparison to ortho-para or para-para , the higherthe availability of Iron is. Within the EDDHA range of products, the ortho-ortho percentages differ. Our top grade quality contains an ortho-ortho content of 4.8%. The figures mentioned are guaranteed figures, not typical. Iron-EDDHA products are microgranulated, dust free products.
Advantages of Eddha Series Eddha Iron Chelate
Faster Absorption
Chelated iron EDDHA 6% offers the advantage of rapid absorption by plants due to its water-soluble form. This means that plants can quickly access the iron they need for essential processes.
Plants require iron for various functions, including photosynthesis and enzyme activation. With EDDHA Iron Chelate, these crucial processes are enhanced, leading to healthier and more robust plant growth.
Effective Chlorosis Prevention
Chelated Iron EDDHA 6% is particularly effective in preventing and correcting chlorosis, a condition where leaves turn yellow due to iron deficiency. By supplying plants with the necessary iron in a chelated form, this fertilizer can swiftly address chlorosis issues.
Improved Plant Health
By providing plants with chelated iron eddha 6%, you can enhance the health and appearance of various plant components. Leaves, shrubs, and ornamentals benefit greatly from the essential iron nutrients delivered through this fertilizer. This results in vibrant foliage and overall improved plant vigor.
Why Choose US
Our Factory
HANGZHOU BETTER CHEMTECH LTD is a comprehensive chemical company specializing in Chemical Production, Management, Application Development and Brand Promotion. Our headquarters is in Hangzhou, China, with service centers in Mumbai, India, and we also have cooperative production bases in China and India.
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As a reliable supplier with many years of professional experiences in the chemical industry, product quality is our primary consideration. We will provide sample testing and confirm the specifications to ensure your satisfactory of the finally shipment goods.
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We totally understand the importance of a stable supply chain for production. The strength of our production chain is our guarantee to provide stable supply. We have pleasure to provide customers with the best supply chain solutions.
Specifications of EDDHA Iron Chelate
Ethylenediamino-N,N'-bis(2-hydroxy-phenyl) acetic acid
CAS No.: 16455-61-1
Molecular Formula: C18H16N2O6FeNa
Molecular Weight: 435.2(396.40)
6% Fe EDDHA is a water soluble form of iron EDDHA that is readily available to turf grass. It can be applied to prevent or correct iron deficiency (chlorosis). This product may be used at any time, but spring applications before the flush of growth recommended to provide iron when the plant's need is greatest.
EDDHA Fe 6% can be applied to the soil with PH≤9 , can make the plant absorption up to 100% , so that its application scope is greatly expanded, the dosage is only 1-5% of the common nutrient. There is no negative impact on the soil after application, on the contrary, it can also fix the beneficial ingredients in the soil, reduce loss, is conducive to regulating the acid and alkaline soil, prevents soil from hardening.
Fe EDDHA 6% is a high-efficiency organic chelated iron. It has super penetration and solubility in water. It is easily absorbed by plants, quickly provides crop nutrition, solves the symptoms of iron deficiency in crops, and regenerates quickly.
Iron Chelate supplies the required micronutrient Iron (Fe) in optimum doses for planets. In plants, iron is required for photosynthesis and chlorophyll synthesis.
Made specifically for Hydroponics. It helps in developing a good root system and improves the efficient absorption of nutrients. Also, EDDHA helps plants to sustain high pH levels.
Iron Chelate is immediately absorbed by the root system and carried throughout the plant, therefore it provides a quick, long-lasting solution to the problem of Iron (Fe) deficiency in all crops.
Dissolve the packet in 1 liter of water to make the liquid solution, then for generic usage apply 1 ml/liter of solution. The instructions provide detailed information on deficiency symptoms in your plant and even the benefits of each nutrient.
Applicable crops
Suitable for iron deficiency crops, as follows: fruit trees include sweet orange, lime, pomelo, lemon, orange, peach, plum, cherry, apple, white pear, sand pear, loquat, persimmon, grape, apricot; Ornamental plants like jasmine, magnolia, camellia, hydrangea, yellow kudzu, yellow orchid, mixi, yellow rose, Chinese catalpa, rhododendron, chrysanthemum, crabapple, eight-fairy flower, white orchid, plum flower, day bamboo; Trees like eucalyptus, nanmu, camphor, acacia, kay wood; Legumes include peanuts, soybeans, broad beans, mung beans; Food crops include sweet potato.
Root irrigation: Dissolve iron chelated EDDHA in a small amount of water first, then add appropriate amount of water as needed for use. Dig 15-20cm deep trenches around the fruit trees crown or along both sides of the plant. Pour the solution evenly into the trenches and fill them up immediately.
Drip irrigation and flush application: Add it regularly to the irrigation water, flush with the water, the dosage is 1.05kg -1.5kg per Ha, the application time depends on the severity of iron deficiency.
Foliar spray: Dilute 3000-5000 times with water.
Chelation in iron supplements involves binding iron molecules to an organic molecule, like EDDHA, to enhance iron absorption by plants. This process prevents iron from reacting with other elements in the soil.
Using chelated iron is crucial on alkaline soils with a pH above 7 because under such conditions, iron becomes less available to plants. Chelated forms ensure optimal iron uptake by plants even in high-pH soils.
- Chelated Iron EDDHA 6% contains EDDHA Iron Chelate at a concentration of 6%, making it highly effective for correcting iron deficiencies in plants.
- This formulation is specifically designed for treating chlorosis, a condition where leaves turn yellow due to lack of chlorophyll caused by iron deficiency.
- The 6% concentration ensures that plants receive a sufficient amount of chelated iron for rapid and visible improvement in their health.
- Chelated Iron EDDHA 6% is suitable for use on trees and shrubs suffering from iron deficiency symptoms, providing them with the necessary nutrients for vibrant growth.
Applying in Gardening and Agriculture
Application Steps
To apply Chelated Iron EDDHA 6% in gardening and agriculture, start by preparing the desired amount based on the area to be treated. Ensure proper protective gear like gloves and goggles.
Next, sprinkle the chelated iron evenly around the base of the plants or trees. Avoid direct contact with plant stems or leaves to prevent any potential damage.
Suitable Methods
For trees and shrubs, consider a soil drenching method where you mix the chelated iron with water and pour it around the root zone. This allows for better absorption by the plants.
When it comes to ornamentals and flowers, opt for a foliar spray application. Mix the chelated iron with water and spray it directly on the leaves for quick absorption.
Importance of Watering
After applying chelated iron EDDHA 6%, watering your plants is crucial for optimal results. Water helps in activating the chelated iron, allowing it to reach the plant roots effectively.
Ensure that you water thoroughly after application to help the soil absorb the nutrients properly. This step is essential for promoting healthy growth in your plants.
Applying chelated iron EDDHA 6% to a citrus tree in your garden. After sprinkling the required amount around the tree's base, you proceed to water it generously.
As days pass, you notice a significant improvement in the tree's overall health. The leaves start to regain their vibrant green color, indicating an increase in chlorophyll production due to the added iron nutrient.
Using Chelated Iron for Plants
Soil Application
Chelated iron eddha 6% is a valuable tool for addressing iron deficiencies in plants. When applied to the soil, this form of chelated iron helps combat iron deficiency, particularly in alkaline soils. The chelate ensures that the iron remains available and accessible to plants, promoting healthy growth.
Improved Plant Health
By providing plants with chelated iron eddha 6%, you can enhance the health and appearance of various plant components. Leaves, shrubs, and ornamentals benefit greatly from the essential iron nutrients delivered through this fertilizer. This results in vibrant foliage and overall improved plant vigor.
Foliar Application
For quick absorption and utilization by crops and vegetables, consider utilizing chelated iron eddha 6% through foliar application. This method allows plants to rapidly uptake the necessary iron, aiding in the correction of deficiencies and ensuring optimal growth.
When it comes to applying chelated iron eddha 6% to different plants, ensure even distribution by mixing it thoroughly with the soil. Water the plants well after application.
Chelated iron is most effective when applied as a soil drench or through foliar spray. This method ensures direct absorption by the plants for quick results.
Timing Recommendations
For optimal results, apply Chelated Iron EDDHA 6% during the early stages of plant growth, preferably in the early spring or late winter. This timing allows the plants to absorb and utilize the iron efficiently.
When applying chelated iron later in the growing season, monitor plant health closely for signs of iron deficiency. Quick action can prevent nutrient deficiencies and promote healthy plant growth.
Benefits on Alkaline Soils
Using chelated iron for plant nutrition on alkaline soils offers several benefits. The chelating agent in EDDHA Iron Chelate helps prevent iron from becoming insoluble in alkaline conditions.
Plants grown in alkaline soils often struggle to access essential nutrients like iron. By using chelated iron fertilizers, such as Fe EDDHA Iron Chelate, you can ensure that plants receive an adequate supply of this vital nutrient.

The preparation method of the EDDHA chelated iron salt comprises the following process steps: a. heating phenol to 40-70 ℃, adding ethylenediamine and glyoxylic acid, and uniformly mixing to obtain an initial mixed material; b. adding glyoxylic acid and an alkaline aqueous solution into the initial mixed material to obtain a reaction raw material mixture; c. heating the reaction raw material mixture to 60-90 ℃ for reaction, and extracting the reaction product by using an extraction solvent to obtain an EDDHA salt solution; d. carrying out chelation reaction on the EDDHA salt solution and inorganic iron salt to obtain an EDDHA chelated iron salt solution; e. and concentrating, centrifugally separating and drying the EDDHA chelated iron salt solution to obtain the EDDHA chelated iron salt. EDDHA chelated iron salt can obtain the high-purity and high-quality EDDHA chelated iron salt.
Selecting Which Iron Chelate to Use
PH control is very important for the uptake off nutrients by the plant. Especially the Iron (Fe) and Manganese (Mn) uptake can be very problematic when the pH is too high.
To make it easier for the plant we use chelates, a chelate is a kind of protector that avoid that the element inside become deposit in the system and not reach the root zone. Every plant is capable to take the element outside the chelate.
There are four main types of chelate that are used in the agro culture, every chelate have its own advantage and disadvantage. Which chelate is the best for you is depending on three things: pH, watering system and element inside the chelate.
Different type of chelates: EDTA, DTPA, HEEDTA and EDDHA (you can also find HEDTA, EDDHMA, EDDHAS etc. but these chelates have more or less the same characteristics)
EDTA > is not stable in a recirculation system and works only till a pH of 5,5 for this reasons It's better not to use this type of Iron chelate.
DTPA > this is the most used iron chelate works till a pH of 6,5 and is very stable in a recirculation system
HEEDTA > this iron chelate works till a pH of 8,0 but is not stable in a recirculation system
EDDHA > this iron chelate works till a pH of 14 and is very stable in a recirculation system.
Take In Mind The Following:
If you want to choose the right iron chelate you need to know two things: Do you re-circulate the water and what is the pH of the water used by the plant. In summer time the plant is using for more than 90% the dripping water, so in this time the pH of the dripping water is important. In winter time the plant is using for more than 70% the water in the slabs, so in winter time the pH of the water in the slabs is important.
After finding the right chelate you are not ready yet because there are different qualities on the market and not every quality is the right one.
DTPA > Available in solid and liquid form. The liquid form have two different qualities one which is containing sodium (Na) and one that contains ammonium (NH4).( If you are not sure what is inside normally 3% Fe is with Na and 6% and 7% Fe is with NH4 ) The best choice for you is depending on the total amount of sodium in your water, if this is to high you must use the more expensive NH4 based iron chelate.
EDDHA > Available in solid and liquid form, if it's available in your area the best is the liquid one because the solid one is a bit greasy and make your fertilizer tank and watering system dirty.
To check the quality of the solid one you need to know the ratio between ortho/ortho, ortho/parra and parra/parra in the product. How higher the percentage ortho/ortho how better the stability of the iron chelate. Between 60 and 70% is now day's common.
Compositions of Eddha Chelated Iron
HEDTA chelated iron fertilizer; iron and trace elements are found in fertilizers.It may be prepared in different ratios. liquid and can be in powder form. Also available from dripping and leaves.
Directly involved in photosynthesis Iron is an essential trace element essential. Iron deficiency in plants grown in arid and semi-occurring calcareous soils in arid regions is the most common micro-nutrients.
The latest young leaves where light deficiency in iron plant is not moving elements become yellowish green. Color turns completely yellow between the veins deficiency increases. The typical feature of iron deficiency is easy to die-hard of klorozl leaves. The chlorosis can be seen in some branches of fruit trees was observed in some branches.
Iron Nutrition in Plants
Iron deficiency is a limiting factor of plant growth. Iron is present at high quantities in soils, but its availability to plants is usually very low, and therefore iron deficiency is a common problem.
Iron Availability to Plants
Although most of the iron on the earth crust is in the form of Fe3+, the Fe2+ form is physiologically more significant for plants. This form is relatively soluble, but is readily oxidized to Fe3+, which then precipitates.
Fe3+ is insoluble in neutral and high pH, making iron unavailable to plants in alkaline and in calcareous soils. Furthermore, in these types of soil, iron readily combines with phosphates, carbonates, calcium, magnesium and hydroxide ions.
Iron Uptake by Plants
Plants uptake iron in its oxidized forms, Fe2+ (ferrous form) or Fe3+ (ferric form).
Plants use various iron uptake mechanisms. One of these is the chelation mechanism - the plant releases compounds called siderophores which bind iron and enhance its solubility. This mechanism also involves bacteria.
Another mechanism involves the release of protons (H+) and reductants by the plant roots, to lower pH levels in root zone. The result is increased iron solubility.
In this respect, choice of the form of nitrogen fertilizer is significant. Ammonium nitrogen increases proton release by roots, thus lowering pH and facilitating iron uptake.
Nitrate nitrogen enhances the release of hydroxide ions that increase pH in the root zone and counteract efficient iron uptake.
New roots and root hairs are more active in iron uptake, therefore it is imperative to maintain a healthy active root system. Any factor interfering with root development interferes with iron uptake.
Managing Iron Deficiencies
When iron deficiency is identified, it can be treated in the short term by applying a foliar spray of iron, but the best course of action is prevention. Therefore, the grower should identify the real cause of the deficiency and treat it, in order to prevent the problem from occurring in the future.
Often, iron deficiency does not indicate insufficient iron supply. It may also be related to various conditions that may affect iron availability. For example: carbonate levels in the soil, salinity, soil moisture, low temperature, concentration of other elements (e.g. competitive microelements, phosphorus, calcium) etc.
Evaluating these factors and correcting them can save a great deal of money spent on ineffective and unnecessary iron applications.
Iron Fertilizers
Iron can be applied as ferrous sulfate or in a chelated form.
Ferrous sulfate (FeSO4) contains about 20% iron. This fertilizer is inexpensive and is mainly used for foliar spraying. Applied to soil, it is often ineffective, especially in pH above 7.0, because its iron quickly transforms to Fe3+ and precipitates as one of the iron oxides.
Iron chelates. Chelates are compounds that stabilize metal ions (in this case - iron) and protect them from oxidation and precipitation. Iron chelates consist of three components:
- Fe3+ Ions
- A complex, such as EDTA, DTPA, EDDHA, amino acids, humic-fulvic acids, citrate.
- Sodium (Na+) or ammonium (NH4+) ions
Different chelates hold iron ions in different strengths at different pH levels. They also defer in their susceptibility to iron replacement by competitive ions. For example, at high concentrations, calcium or magnesium ions may replace the chelated metal ion.
Fe-EDTA - This iron chelate is stable at pH below 6.0. Above pH of 6.5, nearly 50% of the iron is unavailable. Therefore this chelate is ineffective in alkaline soils. This chelate also has high affinity to calcium, so it is advised not to use it in calcium-rich soils or water.
Note that EDTA is a very stable chelate of micro-elements, other than iron, even in high pH levels.
Fe-DTPA - This iron chelate is stable in pH levels of up to 7.0, and is not as susceptible to iron replacement by calcium.
Fe-EDDHA - This chelate is stable at pH levels as high as 11.0, but it is also the most expensive iron chelate available.




