Metalic Fine Chem

Disodium EDTA (Ethylenediaminetetraacetic acid disodium salt) is one of the most ubiquitous and versatile chemical compounds in the world. While it is chemically similar to the Dipotassium EDTA we discussed earlier, the "Sodium" version is the industry standard for food, medicine, and manufacturing due to its cost-effectiveness and stability.

 

Chemical Profile

•  Chemical Formula: $Na_2C_{10}H_{14}N_2O_8$ (Commonly found as the dihydrate: $Na_2EDTA \cdot 2H_2O$)

   

•  Appearance: A white, odorless, free-flowing crystalline powder.

   

• Solubility: Moderately soluble in water. Its solubility increases significantly as the pH of the solution becomes more alkaline.

   

• pH: A 5% solution typically has a pH between 4.0 and 6.0 (slightly acidic).

Primary Applications1. Food and Beverage (The "Preservative")

If you check the label on your mayonnaise, salad dressing, or canned soda, you will likely see Disodium EDTA.

 

• Color Retention: It prevents trace metals from reacting with vitamins and pigments, which keeps food from turning brown or grey.

• Flavor Stability: It stops metal-catalyzed oxidation of fats and oils, preventing rancidity.

   

2. Medicine and Laboratory

• Chelation Therapy: Used medically to treat heavy metal poisoning (like lead or mercury) by grabbing the metals in the bloodstream so they can be excreted in urine.

   

• Anticoagulant: Like the potassium version, it is used in blood collection tubes, though usually for specific tests where potassium levels must remain undisturbed.

3. Cosmetics and Cleaning

• Hard Water Softener: In shampoos and soaps, it "deactivates" the calcium and magnesium in tap water. This allows the soap to lather better and prevents "soap scum" from sticking to your hair or skin.

   

•  Preservative Booster: By binding the minerals that bacteria need to grow, it makes other preservatives in the formula much more effective

Dipotassium EDTA (Ethylenediaminetetraacetic acid dipotassium salt) is a powerful chelating agent—a molecule that acts like a chemical "claw" to grab and hold onto metal ions. You’ll most commonly encounter it in medical laboratories and high-end skincare formulations.

Chemical Profile

• Chemical Formula: $K_2C_{10}H_{14}N_2O_8$ (often seen as the dihydrate: $K_2EDTA \cdot 2H_2O$)

• Appearance: A fine, white, odorless crystalline powder.

• Solubility: Highly soluble in water. It is generally preferred over Disodium EDTA when higher solubility or a specific potassium balance is required.

Primary Uses1. Hematology (The "Purple Top" Tube)

The most critical use of Dipotassium EDTA ($K_2EDTA$) is as an anticoagulant for blood samples.

• How it works: It binds (chelates) the calcium ions in the blood. Since calcium is a vital component in the clotting cascade, the blood remains liquid for testing.

• Why Potassium? $K_2EDTA$ is preferred over the sodium version ($Na_2EDTA$) for blood counts because it is more soluble and has less impact on cell shrinkage or morphology.

2. Cosmetics and Personal Care

It acts as a stabilizer in soaps, shampoos, and lotions.

• Prevents Rancidity: By binding trace metals, it prevents them from catalyzing the oxidation of oils.

• Hard Water Defense: It prevents metal ions in tap water (like magnesium and calcium) from interfering with surfactants, ensuring the product lathers well.

3. Industrial and Laboratory Use

• Metal Analysis: Used to mask specific metal ions during chemical reactions so they don't interfere with the results.

• Decontamination: Used in cleaning agents to remove scale or metal deposits.

Chemical & Physical Properties

• Chemical Formula: $C_{10}H_{12}MgN_2Na_2O_8$

• Appearance: A fine white odorless powder or micro-granules.

• Solubility: Highly soluble in water ($approx. 900$ g/L at $20$°C).

• Stability: It is chemically stable and resistant to premature degradation in soil or liquid mixes.

• pH Range: It is most effective and stable in solutions with a pH between 6.0  and 10.0.

Primary Applications

Magnesium EDTA is primarily used where magnesium needs to be delivered efficiently without being "locked up" by other chemicals.

• Agriculture & Horticulture: Its most common use is as a micronutrient fertilizer. Because it is chelated, it prevents magnesium from reacting with phosphates or carbonates in the soil, ensuring the plant can actually absorb the magnesium.

• Hydroponics: Used in nutrient film techniques and drip irrigation because it does not clog nozzles and remains available to plants in a wide range of water qualities.

• Industrial Water Treatment: Used to control water hardness and prevent scale buildup in industrial boilers and cooling systems.

• Lab Chemistry: Used as a titrating agent in analytical chemistry to determine the concentration of other metal ions.

Benefits of the Chelated Form

Why use Magnesium EDTA instead of Magnesium Sulfate (Epsom Salts)?

1. Efficiency: Plants can absorb chelated magnesium more easily through both roots and leaves (foliar feeding).

2. Compatibility: It can be mixed with many other fertilizers and pesticides without causing a chemical reaction or precipitation.

3. Soil Stability: In alkaline soils where standard magnesium would become unavailable to plants, the EDTA "shield" keeps the magnesium accessible.

This combination is a high-performance micronutrient chelate specifically designed for agriculture. By combining Calcium (Ca) and Magnesium (Mg) with Boron (B) and an EDTA chelating agent, it ensures that these often-immobile nutrients are easily absorbed and transported throughout the plant.

Technical Description1. The Components

• Calcium (Ca): The "structural engineer" of the plant. It strengthens cell walls, improves fruit quality, and prevents physiological disorders like bitter pit in apples or blossom end rot in tomatoes.

• Magnesium (Mg): The core of the chlorophyll molecule. It is essential for photosynthesis and enzyme activation.

• Boron (B): A critical partner for Calcium. It assists in sugar transport, pollen germination, and cell wall formation. Boron acts as a "catalyst" that helps the plant utilize Calcium effectively.

• EDTA (Ethylenediaminetetraacetic acid): This is the chelating agent. It acts like a protective "claw" around the Calcium and Magnesium ions, preventing them from reacting with other minerals in the soil or water, which would otherwise make them unavailable to the plant.

2. Physical Characteristics

Typically, this product appears as a fine, free-flowing powder (often white or off-white) or a highly concentrated liquid. It is designed to be 100% water-soluble, making it ideal for:

• Foliar Sprays: Absorbed directly through the leaves.

• Fertigation: Delivered through drip irrigation systems.

• Hydroponics: Maintaining nutrient balance in soil-less environments.

Copper EDTA (Ethylenediaminetetraacetic Acid Cupric Disodium) is a stable, water-soluble metal chelate. In both agriculture and industry, it is the gold standard for delivering Copper (Cu) in a form that remains "bioavailable," meaning it won't get locked up by soil chemistry or other interfering ions.

Technical Specifications

• Chemical Formula: $C_{10}H_{12}CuN_{2}Na_{2}O_{8}$

• Appearance: Typically a bright blue crystalline powder or liquid solution.

• Copper Content: Usually contains 12% to 15% elemental copper by weight in powder form.

• Solubility: Highly soluble in water, allowing for rapid absorption by plant tissues or integration into industrial processes.

Key Roles & Applications1. Agriculture & Horticulture

Copper is an essential micronutrient for plant health, primarily acting as an activator for several enzyme systems.

• Photosynthesis & Respiration: It is vital for the electron transport chain in chloroplasts.

• Lignin Formation: Copper helps synthesize lignin, which provides structural strength to cell walls (preventing "floppy" growth).

• Disease Resistance: Proper copper levels help plants defend against fungal and bacterial pathogens.

2. Why "Chelated" Copper?

Regular Copper Sulfate ($CuSO_{4}$) can often become tied up in the soil, especially in high pH (alkaline) soils.

• The "Claw" Effect: The EDTA molecule surrounds the copper ion, protecting it from reacting with carbonates or hydroxides in the soil.

• Systemic Movement: Once applied (foliar or soil), the chelated copper moves more efficiently through the plant’s vascular system compared to inorganic salts.

3. Industrial Uses

• Chemical Synthesis: Acts as an oxidation catalyst in various organic reactions.

• Textiles & Paper: Used in dyeing processes and as a preservative to prevent the degradation of fibers.

• Water Treatment: Used in specific controlled environments to manage algae growth without the immediate precipitation issues of raw copper salts.

Zinc EDTA is a stable, water-soluble chelate mainly used to correct zinc deficiencies in agriculture and as a specialized ingredient in industrial processes. By "chelating" the zinc ion, the EDTA molecule acts like a protective shell, preventing the zinc from reacting with other elements in the soil or solution.

 

Product Specifications & Properties

Typically, Zinc EDTA is found as a free-flowing white powder or micro-granules. Below are the standard technical parameters:

Key Applications

• Agriculture (Micronutrient Fertilizer): It is the most effective way to deliver zinc to crops. Unlike Zinc Sulphate, which can become "locked" in alkaline soils, Zinc EDTA remains available for plant uptake. It is commonly used via foliar spray or fertigation systems.

   

• Industrial Uses: Used in the textile industry for bleaching and dyeing processes, and in the chemical industry as a stabilizing agent.

•  Water Treatment: Acts as a sequestering agent to control metal ions in various aqueous systems.

   

Key Benefits

•  High Stability: Remains stable across a wide pH range (typically pH 4 to 9).

   

• Quick Absorption: Because it is highly soluble, plants can absorb the zinc through leaves or roots almost immediately.

•  Compatibility: Can be safely mixed with most liquid fertilizers and pesticides without causing precipitation.

Fe EDTA 12% (or 13% depending on the brand) is a high-quality, water-soluble micronutrient fertilizer. It is used to prevent and correct Iron chlorosis (yellowing of leaves) in plants, especially when soil conditions make natural iron unavailable to the roots.

Chelation—the "EDTA" part—acts like a protective claw, holding the iron ion in a form that remains stable and available to the plant even when soil chemistry would normally lock it up

Fe EDTA is specifically designed for high-efficiency application systems due to its excellent solubility profile.

• Water Solubility: Approximately 90 g/L to 100 g/L at 20°C.

• Rate of Dissolution: It dissolves rapidly without leaving residues, making it ideal for:

  • Drip Irrigation (Fertigation)

     

  •  Foliar Sprays (Leaves absorb the chelated iron directly)

     

  • Hydroponics (Where precise nutrient control is required)

Usage Guidelines

 

1. Foliar Application: Use a concentration of 0.5g to 1.0g per liter of water. It is best applied in the early morning or late evening to avoid leaf burn.

2. Soil Application: The dosage depends on the severity of the deficiency and crop type, but generally ranges from 500g to 1kg per acre.

3. Compatibility: It is compatible with most NPK fertilizers and pesticides. However, avoid mixing with highly acidic solutions or concentrated phosphate fertilizers in the same tank without dilution.

Calcium EDTA (Ethylenediaminetetraacetic acid calcium disodium salt) is a specialized "chelating agent." In chemistry, a chelator is a molecule that acts like a claw, grabbing onto specific metal ions to prevent them from reacting or to move them safely through a system.

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Chemical Description

The formula for the common hydrated form is $C_{10}H_{12}CaN_2Na_2O_8 \cdot 2H_2O$.

• Structure: It is a white, odorless, and tasteless crystalline powder.

• Stability: Unlike standard EDTA, which can strip calcium from the body or a solution, Calcium EDTA is already "saturated" with a calcium ion. This makes it safer for biological use because it won't cause calcium deficiency.

• Solubility: It is highly soluble in water and stable over a wide pH range.

   

Primary Uses and Applications

Calcium EDTA is most famous for its role in medicine, but it is equally important in the food and manufacturing industries.

 

1. Medical: Lead Poisoning Treatment

This is the most critical application of Calcium EDTA (specifically Calcium Disodium Versenate).

• Chelation Therapy: When injected into a patient with lead poisoning, the EDTA "claw" releases its calcium ion and grabs a lead ion instead, because it has a higher affinity for lead.

• Excretion: Once the lead is trapped inside the EDTA molecule, it becomes water-soluble and is safely filtered out of the body through the kidneys in urine.

2. Food Industry (Preservative)

On food labels, you will often see it listed as Calcium Disodium EDTA.

 

• Color Retention: It prevents trace metals (like iron or copper) from promoting oxidation, which would otherwise cause canned vegetables or soda to change color or go rancid.

• Flavor Stability: It protects the delicate oils in salad dressings and mayonnaise from turning "off" due to metal-catalyzed reactions.

   

3. Agriculture

• Micronutrient Delivery: It is used to deliver essential minerals to plants. Because the metal is "wrapped" in the EDTA, it doesn't react with the soil or get stuck in the dirt, allowing the plant's roots to absorb the nutrients more efficiently.

   

4. Laboratory and Industrial

• Decontamination: It is used to clean surfaces contaminated with radioactive metals or heavy metals.

• Analytical Chemistry: It helps in titrations to determine the hardness of water or the concentration of specific metal ions in a sample.