Chemical Name: Ethylene Diamine Tetraacetie Acid—Copper15%
Other names: EDTA-Cu Salt, EDTA-CuNa2
Molecular Formula: C10H12N2O8Cu
Molecular Weight: 397.77
CAS No. : 14025-15-1
EINECS：237-864-5
Specification
| Item | Standard |
| Appearance | Blue Microcrystal powder |
| Chelated Cu | 15 (+/- 0.5) % min |
| PH(10g/L, 25℃) | 6.0-7.0 |
| Heavy metal as Pb | 0.001% max |
| Cd | 0.001% max |
| As | 0.0002% max |
| Matter insoluble | 0.1% |
Characteristics: dust-free product, easily and rapidly soluble in water because of its porous, compatible with most water-soluble fertilizers
Packing: 25kg bag/drum, customized packing is available.
Store: Store in a cool and dry place. Re-seal partly used packs tightly.
Usage:
As a foliar fertilizer and compound fertilizer raw materials. In addition to single-element EDTA chelates, it also offers physical mixes (blends) or compounds (chemical mixes). For physical mixes, macro-nutrients and/or additives like amino acids and humic acids can be added.
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Applications
EDTA Cu is widely used in precision agriculture as a foliar spray and fertigation solution. Copper is essential for enzyme activity, photosynthesis, and disease resistance in crops. Copper deficiency is common in organic-rich and sandy soils, manifesting as wilting, blue-green discoloration of leaves, and poor pollen viability. EDTA Cu is effective in soil pH 4–7, making it suitable for a broad range of agricultural conditions. Common crops that benefit include cereals, citrus, stone fruits, and vegetables. Typical foliar application rates range from 50–200 g/ha depending on deficiency severity. EDTA Cu is also used in compound fertilizer manufacturing to deliver micronutrient blends, and can be combined with humic acids or amino acids for enhanced soil uptake.
Copper in Plant Metabolism
Copper is a micronutrient with outsized biochemical importance: it is a structural component of plastocyanin (which shuttles electrons in Photosystem I), a cofactor of laccase and ascorbate oxidase (enzymes involved in lignin and cell-wall synthesis), and central to superoxide dismutase activity. Adequate copper supply translates directly into improved stem rigidity, better resistance to fungal pathogens, and more efficient photosynthetic electron transport.
Deficiency Recognition and Risk Factors
Copper deficiency is most common on peat soils, organic-rich soils, and heavily limed sandy soils. Symptoms first appear on young leaves — a bluish-green colour that fades to pale yellow, followed by wilting and tip necrosis despite adequate soil moisture. In cereals, “reclamation disease” or “wither tip” is the classic presentation; in citrus, “dieback” occurs at the tips of new shoots. Because copper is immobile in the phloem, regular foliar applications are more effective than correcting soil reserves alone. EDTA Cu provides a chelated copper source with significantly higher bioavailability than copper sulphate, and at lower application rates — reducing risk of phytotoxicity, which is a real concern with conventional copper sprays at high rates.
Dosage, Safety, and Formulation
Foliar application rates for EDTA Cu are typically 0.05–0.15% (0.5–1.5 g per litre), considerably lower than for other micronutrients due to copper’s narrow toxicity margin. For fertigation, 0.3–0.8 kg per hectare per season is usually sufficient as maintenance. Do not apply copper-containing products within 30 days of sulphur-based fungicides to avoid phytotoxic copper sulphide formation. EDTA Cu is stable across pH 5.5–7.0 and compatible with most balanced NPK solutions. Export documentation including COA, MSDS, and phytosanitary certificate is provided. Samples available upon request; contact us for current pricing and packing options.