Product Overview & Executive Summary
Product Name: Magnesium Oxide Granules
Synonym: Food Grade MgO Granules, Granular Magnesia, High Purity MgO Pellets
Chemical Formula: MgO
CAS Number: 1309-48-4
EINECS Number: 215-171-9
Product Description
Magnesium Oxide Granules are produced from carefully selected high-purity magnesium carbonate or hydroxide via controlled calcination, granulation,and precision sieving. The resulting granules feature uniform size distribution, smooth surfaces, and low moisture content, enhancing solubility, dispersibility, and functional performance in food applications.
These granules provide a high magnesium content (≥98% MgO) while maintaining excellent chemical stability and minimal contamination, making them suitable for human consumption in fortified foods, beverages, and dietary supplements.
The product's bulk density can be adjusted (0.5–1.0 g/cm³) to optimize flowability and compaction, while controlled porosity ensures predictable reactivity and solubility. Their dust-free, free-flowing nature reduces handling risks and facilitates automated dosing and large-scale food processing.
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Key Features
Food Grade Purity: Magnesium oxide content ≥98%, compliant with food safety standards.
Granular Form: Dust-free, easy to handle, reduces product loss during processing.
Enhanced Flowability: Ideal for mixing, extrusion, and automated feeding systems.
Stable Composition: Resists moisture and CO2 absorption, ensuring long-term quality.
Tunable Bulk Density: 0.5–1.0 g/cm³ for optimal processing.
Custom Particle Size: Available in 0.3–3 mm granules or tailored sizes.
Safe for Food Applications: Compliant with FDA, USP, FCC, and ISO regulations.
Detailed Technical Specifications & Analytical
Chemical Composition & Purity
| Parameter | Specification | Standard Grade | High Purity Grade | Test Method |
Magnesium Oxide (MgO) | ≥ 98% | 98 - 99% | ≥ 98.5% | Gravimetric |
Loss on Ignition (LOI) | ≤ 3.0% | 2.5% | 1.8% | 950°C ± 25°C |
Calcium Oxide (CaO) | ≤ 0.5% | 0.3% | ≤ 0.2% | ICP-OES |
Iron (as Fe2O3) | ≤ 0.05% | 0.03% | ≤ 0.01% | Colorimetric |
Chlorides (as Cl) | ≤ 0.1% | 0.07% | ≤ 0.05% | Potentiometric |
Sulfates (as SO4) | ≤ 0.15% | 0.1% | ≤ 0.08% | Gravimetric |
Heavy Metals (as Pb) | ≤ 0.005% | Complies | ≤ 0.002% | USP/EP |
Arsenic (As) | ≤ 0.0003% | Complies | ≤ 0.0001% | ICP-MS |
| SiO2 | ≤ 0.2% | 0.18% | ≤ 0.1% | XRF |
| Moisture Content | ≤ 0.3% | 0.25% | ≤ 0.2% | Gravimetric |
Physical Properties
Parameter | Specification / Typical Value | Test Method | Notes |
Appearance | White, spherical or irregular granules | Visual | Smooth, non-caking surface |
Bulk Density (Loose) | 0.5–1.0 g/cm³ | ASTM B527 | Low density enhances solubility |
Tapped Density | 0.8–1.2 g/cm³ | ASTM B527 | — |
Particle Size (D50) | 0.3–3.0 mm (customizable) | Laser Diff. | Other sizes upon request |
| Specific Surface Area (BET) | 10–25 m²/g | BET | High surface area for reactivity |
Whiteness | ≥ 93% | CIE Lab | — |
Oil Absorption | 30–60 g/100g | ASTM D281 | Indicates surface porosity |
| Refractoriness | ≥ 1800°C | Furnace Test | Sufficient for mild thermal use |
Moisture Content | ≤ 0.3% | Gravimetric | Controlled for storage stability |
| Solubility | Practically insoluble in water | — | Soluble in dilute acids |
Key Characteristics & Functional Advantages
Flowability & Handling Efficiency: Granular form ensures uniform feeding in large-scale production, reduces dust, and minimizes material loss.
Thermal Stability: Retains structure and performance at high temperatures.
Controlled Reactivity: Predictable dissolution and chemical activity in food matrices.
High Mechanical Integrity: Granules resist attrition during transport and processing.
Excellent Chemical Stability: Maintains composition under exposure to air, CO2, and moisture.
Versatile Applications: Suitable for food fortification, antacid formulations, and premix blends.
Thermal Stability: Retains structure and performance at high temperatures.Controlled Reactivity: Predictable dissolution and chemical activity in food matrices.
High Mechanical Integrity: Granules resist attrition during transport and processing.
Excellent Chemical Stability: Maintains composition under exposure to air, CO2, and moisture.
Versatile Applications: Suitable for food fortification, antacid formulations, and premix blends.
Primary Applications & Industries Served
Food & Nutritional Supplements: Used in tablets, powders, and beverages for magnesium fortification.
Functional Foods & Beverages: Magnesium enrichment in shakes, juices, and fortified drinks.
Antacid & Digestive Aids: Granular MgO as an active ingredient in food-grade antacids.
Bakery & Confectionery: Provides mineral fortification without affecting taste or texture.
Feed & Pet Food: Supplies essential magnesium in animal nutrition.
Food Processing Additive: Functions as pH regulator, stabilizer, drying agent, or anti-caking agent.
Packaging, Storage & Handling
Packaging Options: 25 kg kraft paper bags with PE liner, 500/1000 kg big bags; vacuum-sealed packaging available on request.
Storage: Store in cool, dry, ventilated area, away from moisture and CO2.
Shelf Life: 24 months if sealed.
Handling Precautions: Avoid dust inhalation; use PPE including mask, goggles, gloves.
Safety Information (Summary of SDS)
GHS Classification: Not hazardous under GHS.
Hazard Statements: May cause mild irritation if dust contacts eyes or is inhaled.
First Aid Measures:
- Inhalation: Move to fresh air; seek medical attention if discomfort persists.
- Eye Contact: Rinse with clean water for several minutes.
- Skin Contact: Wash thoroughly with soap and water.
- Ingestion: Rinse mouth; consult medical advice if ingested in large quantities.
Quality Assurance & Customization
Quality Management System: Produced under ISO 9001:2015 standards.
Batch Traceability: Each shipment includes a Certificate of Analysis (CoA) verifying purity and physical parameters.
Regulatory Compliance: Meets REACH, RoHS, FCC, USP, ISO food standards.
Customization Services:
- Tailored particle size distribution (0.3–5 mm).
- Adjustable bulk density and flowability.
- Surface treatments for enhanced dispersibility.
- Controlled calcination for optimized reactivity.