Amino Acid Chelated Magnesium (CAS 68917-51-1)

Introduction to Amino Acid Chelated Magnesium

Amino Acid Chelated Magnesium is an organic trace mineral complex where magnesium ions are tightly bound to amino acid ligands via coordinate bonds. This neutral molecular structure allows direct penetration through plant cuticles and animal intestinal mucosa without requiring extra metabolic energy for dissociation. Commercial farms and feed mills consume most of the global output, dosing it to correct chlorosis in crops or reduce heat stress in livestock.

The main processing advantage is complete water solubility without precipitation. The neutral chelate structure prevents reaction with phosphates or calcium in liquid NPK tank mixes, keeping the solution clear and stable. The critical storage risk is moisture absorption. The free amino acid fraction is highly hygroscopic; an opened bag left in 80% relative humidity will clump into a solid mass within 48 hours. Store the product in a dry warehouse, tie the inner PE liner tightly, and use opened bags immediately.

Key Features of Amino Acid Chelated Magnesium

• Zero ion antagonism in tank mixes. The coordinate bonds shield the Mg2+ charge, preventing precipitation when blended with high-phosphorus or calcium-based liquid fertilizers in agricultural sprayers.
• Direct cuticle penetration for foliar sprays. The neutral chelate molecule bypasses the electrostatic repulsion of plant leaf surfaces, delivering magnesium directly into the mesophyll cells to restart chlorophyll synthesis within 48 hours.
• High bioavailability in animal feed. Absorption in the livestock gut occurs via amino acid transport channels rather than passive ion diffusion, increasing magnesium retention by up to 30% compared to standard inorganic salts.
• Stress mitigation for livestock. Bioavailable magnesium regulates nerve impulse transmission and muscle contraction, significantly reducing transport stress and preventing grass tetany in dairy cattle during spring grazing.

Amino Acid Chelated Magnesium Chemical & Physical Properties

Applications of Amino Acid Chelated Magnesium

Foliar sprays for high-value crops: Applied at 1.0–2.0 g/L (0.1–0.2% w/v) during the vegetative stage, the chelated magnesium bypasses soil fixation and directly enters leaf stomata. This corrects interveinal chlorosis in tomatoes, citrus, and grapes within 3–5 days without burning the leaf tissue.

Liquid NPK and suspension fertilizers: Dosed at 2.0–5.0% in liquid fertilizer formulations, the neutral chelate prevents the formation of insoluble magnesium ammonium phosphate struvite crystals. This keeps drip irrigation lines clear and ensures uniform nutrient delivery to the root zone.

Poultry and swine feed fortification: Blended at 100–200 g per metric ton of complete feed, the amino acid transport pathway ensures high magnesium absorption even in the presence of dietary phytates. This improves eggshell quality in layers and reduces pale, soft, exudative (PSE) meat in market hogs.

Dairy cattle mineral supplements: Added to total mixed rations (TMR) at 15–30 g per cow per day during the transition period. The high bioavailability maintains blood serum magnesium levels above 2.0 mg/dL, preventing hypomagnesemic grass tetany during early lactation.

Storage & Safety Precautions for Amino Acid Chelated Magnesium

• Storage: Keep tightly sealed in a cool, dry warehouse below 30 °C (86 °F). The free amino acids are highly hygroscopic; an opened bag left in 80% relative humidity will absorb moisture and clump into a solid block within 48 hours. Stack pallets away from exterior walls to avoid condensation.
• Safety: Classified as non-hazardous. Wear standard dust masks and safety goggles when handling dry powder to avoid respiratory and eye irritation. Wash skin with water after contact.
• Transport: Amino Acid Chelated Magnesium is Non-DG under IATA/IMDG/ADR. Not a marine pollutant. Standard 25 kg (55 lb) bags or 1000 kg (2,200 lb) jumbo bags ship in standard dry containers.
• QC note: When testing the chelation rate, use gel permeation chromatography or EDTA titration at specific pH buffers. A simple total magnesium assay by AAS (ASTM E2414) only confirms elemental content, not whether the magnesium is truly chelated or just physically mixed with amino acids.

Amino Acid Chelated Magnesium FAQ

Q: Why does my liquid fertilizer precipitate when I add inorganic magnesium, but not this chelate (CAS 68917-51-1)?

A: Inorganic Mg2+ reacts with phosphates to form insoluble struvite. The amino acid ligands shield the magnesium charge, preventing this reaction. The tank mix remains clear and will not clog drip irrigation lines.

Q: The powder clumped into a hard block inside the bag. Is it ruined?

A: Not ruined. The amino acids absorbed moisture and crystallized. The chelate structure remains intact. Crush the block mechanically or dissolve it directly in the mixing tank. Store below 30 °C (86 °F) and seal bags tightly.

Q: Can I use this for organic certified farming?

A: Usually yes, if the amino acid source is plant-derived and heavy metals meet NOP limits. Verify the raw material origin on the COA before submitting to your local organic certifier.