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Chelated micronutrients are essential for preventing and correcting nutrient deficiencies in high-yield crop production. Choosing between EDTA and EDDHA configurations depends heavily on soil pH conditions and application methods.

As a leading producer and exporter from China, x-humate delivers high-purity chelated fertilizers manufactured to strict international standards for global agricultural markets.

EDTA vs. EDDHA: Technical Differences

The primary differentiator between these two chelating agents is their stability across different soil pH levels.

EDTA Chelated Fertilizers (Ethylenediaminetetraacetic Acid)

  • Optimal pH Range: Highly stable in acidic to neutral soils (pH 4.0 to 6.5).

  • Primary Elements: Available as single-element chelates including EDTA-Fe 13%, EDTA-Zn 15%, EDTA-Mn 13%, EDTA-Cu 15%, EDTA-Ca 10%, and EDTA-Mg 6%.

  • Best Application: Ideal for foliar spraying because of its excellent leaf absorption rates. It is also widely used in open-field fertigation for acidic or neutral soils and as raw materials for water-soluble NPK blending.

EDDHA Chelated Fertilizers (Ethylenediamine-N,N'-bis(2-hydroxyphenylacetic acid))

  • Optimal pH Range: Extreme stability in highly alkaline and calcareous soils (pH 4.0 to 9.0).

  • Primary Elements: Commonly manufactured as EDDHA-Fe 6% (with varying ortho-ortho isomer content, such as 1.2%, 2.0%, 3.0%, 4.0%, and 4.8%).

  • Best Application: Strictly applied via soil injection, base application, or drip irrigation. The ortho-ortho isomer structure prevents iron from precipitating and locking up in high-pH soils, ensuring long-term iron availability to block yellow-leaf disease (chlorosis).

Manufacturing & Quality Specifications

At our advanced chelated fertilizer factory in China, we control the synthesis process to ensure high chelation efficiency, rapid water solubility, and zero clumping.

Product Type Active Content Appearance Water Solubility pH Stability Range
EDTA-Fe 13% Fe ≥ 13.0% Yellow/Brown Powder 100% 4.0 – 6.5
EDTA-Zn 15% Zn ≥ 15.0% White Powder 100% 4.0 – 6.5
EDTA-Mn 13% Mn ≥ 13.0% Light Pink Powder 100% 4.0 – 6.5
EDTA-Cu 15% Cu ≥ 15.0% Blue Powder 100% 4.0 – 6.5
EDDHA-Fe 6% Fe ≥ 6.0% (o-o 1.2-4.8%) Dark Red/Black Granule/Powder 100% 4.0 – 9.0

Factory Sourcing, Exporting & Pricing

As an established China EDTA and EDDHA manufacturer, we streamline bulk distribution with competitive, factory-direct pricing and flexible packaging architectures.

  • Export Packing Options: Standard 25kg woven bags with PE inner liners, 25kg kraft paper bags, or customized 1kg/5kg small aluminum foil pouches branded for your local market. Shipping marks are fully customizable for port-of-entry compliance.

  • Supply Capacity & Logistics: Prompt container loading out of Tianjin port. Multi-ton production capacity ensures consistent supply chains during peak agricultural seasons worldwide.

  • EDTA Price Dynamics: Market pricing fluctuates based on raw material costs (such as chloroacetic acid, ethylenediamine, and metal salts) and ocean freight rates. Contact us directly with your volume requirements for an updated, competitive FOB or CIF quotation.