Why It Matters
Fe/Zn/Mn/Cu precipitate as hydroxides/phosphates at fertigation pH and become plant-unavailable; need chelants that hold the metal soluble plus the micronutrient salts themselves
Solution Approach
Fe/Zn/Mn/Cu precipitate as hydroxides/phosphates at fertigation pH and become plant-unavailable; need chelants that hold the metal soluble plus the micronutrient salts themselves RawSource supplies the base chemicals that go into these programs. We can help with product selection, grade matching, and sourcing from multiple origins for supply security.
Typical Application Workflow
1
Application & Agronomic Review
Define the use (crop input, adjuvant, soil amendment, post-harvest) and the agronomic, regulatory, and tank-mix requirements.
2
Input & Grade Selection
Match the surfactant or adjuvant, nutrient source, chelate, or formulation aid to the active, water quality, and label.
3
Compatibility & Rate Trial
Confirm tank-mix compatibility, dose, and stability, and size packaging (jugs, drums, totes, bulk) to the season and logistics.
4
Field Validation
Validate efficacy and crop safety in field trials, and lock the spec and supply plan for the season.
Recommended Chemistries (7)
Ethylenediaminetetraacetic Acid
CAS 60-00-4
Amines & Amides
Chelation / Sequestration
EDTA wraps Fe/Zn/Mn/Cu in a stable ring so the metal stays soluble and plant-available through the neutral fertigation pH range
Melting Point: 237 °C Density: 0.86 at 20 °C Solubility: 1000000 mg/L at 25 °C
Full Details
DTPA (Diethylenetriaminepentaacetic Acid)
CAS 67-43-6
Amines & Amides
Chelation / Sequestration
Higher-stability pentadentate chelate holds iron soluble up to ~pH 7-7.5, beyond EDTA's range, preventing lime-induced chlorosis
Physical Description: White to off-white solid Boiling Point: Decomposes Melting Point: 219-220 ºC
Full Details
Citric Acid (Anhydrous, FCC Food Grade)
CAS 77-92-9
Acids & Salts
pH adjuster
Biodegradable weak chelant that keeps micronutrients available in foliar sprays where strong synthetic chelants aren't wanted
Melting Point: 153 °C (anhydrous) Boiling Point: Decomposes Density: 1.54 at 20 °C
Full Details
Zinc Sulfate
CAS 7733-02-0
Acids & Salts
Biocidal Action
3077 (ZINC SULFATE) · Class Soluble Zn salt supplying the zinc that the chelant then keeps plant-available
Physical Description: Anhydrous zinc sulfate is a colorless crystalli… Appearance: Colorless, orthorhombic crystals Melting Point: 100 °C
Full Details
Ferrous Sulfate
CAS 7720-78-7
Acids & Salts
pH Adjustment
Soluble ferrous (Fe2+) salt supplying the iron the chelant then holds plant-available; the Fe source for correcting iron chlorosis
Physical Description: Ferrous sulfate appears as a greenish or yellow… Appearance: White orthorhombic crystals, hygroscopic Boiling Point: > 300 °C
Full Details
Manganese Sulfate
CAS 7785-87-7
Acids & Salts
Conditioning
Soluble manganese sulfate supplies the Mn the chelant keeps in solution, correcting manganese deficiency in high-pH soils
Physical Description: Pellets or Large Crystals; Dry Powder, Pellets … Appearance: White orthorhombic crystals Boiling Point: Decomp @ 850 °C
Full Details
Copper sulfate pentahydrate
CAS 7758-99-8
Acids & Salts
Biocidal Action
3288 (COPPER SULFATE PENTAHYDRATE) · Class Soluble copper sulfate supplies the Cu micronutrient that the chelant protects from hydroxide/phosphate precipitation at fertigation pH
Melting Point: 147 °C (dehydrates) Boiling Point: 653 °C at 760 mmHg (decomposes) Density: 2.284
Full Details