Product Overview & Executive Summary
Magnesium Carbonate Granules - Product Datasheet & Specifications
Product Name: Magnesium Carbonate Granules
Synonym: Granular Magnesium Carbonate, Food Grade Magnesite Granules, MgCO3 Granular Form
Chemical Formula: MgCO3
CAS Number: 546-93-0
EINECS Number: 208-915-9
Product Description
Food Grade Magnesium Carbonate Granules are produced via controlled precipitation and granulation from high-purity magnesium solutions, followed by filtration, drying, granule formation, and classification to achieve uniform particle shape and optimized flowability.
The product appears as white, hard granules with a mean particle size typically between 0.3–1.5 mm, depending on customization. Each granule is dense and stable, ensuring no caking or clumping during long-term storage. The MgCO3 content is ≥98%, and impurities such as chloride, sulfate, and heavy metals are tightly limited to meet food-grade and pharmacopoeia standards.
Because of its porous internal structure and stable granule morphology, it dissolves gradually in acid environments, making it particularly suitable for controlled-release magnesium supplementation, antacid tablets, and health food blends. The granules also serve as a stabilizer, anti-caking agent, and pH regulator in various food systems.
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Key Features
High-Purity Food Grade: Purity ≥98%, fully meets international food standards.
Granular Form: Ideal for automated processing with minimized dust and loss.
Excellent Flowability: Ensures uniform distribution and precise dosing in mixers or feeders.
Low Moisture Content: Maintains chemical stability and prevents caking during storage.
Stable Particle Structure: Durable, non-friable granules resistant to humidity and friction.
Customizable Granule Sizes: Adjustable between 0.3–1.5 mm to suit customer requirements.
Regulatory Compliance: Conforms to FCC, USP, ISO, and FDA food-grade standards.
Eco-Friendly Manufacturing: Produced via sustainable precipitation and drying processes.
Detailed Technical Specifications & Analytical
Chemical Composition & Purity
| Parameter | Specification | Standard Grade | High Purity Grade | Test Method |
Magnesium Carbonate (MgCO3) | ≥ 98.0% | 97–98% | ≥ 98% | Gravimetric |
Loss on Ignition (LOI) | 32–34% | 33–35% | 32–34% | 950°C ± 25°C |
| Calcium Carbonate (CaCO3) | ≤ 0.3% | ≤ 0.5% | ≤ 0.3% | ICP-OES |
Iron (as Fe2O3) | ≤ 0.01% | ≤ 0.03% | ≤ 0.01% | Colorimetric |
Chlorides (as Cl) | ≤ 0.02% | ≤ 0.03% | ≤ 0.02% | Potentiometric |
Sulfates (as SO4) | ≤ 0.05% | ≤ 0.08% | ≤ 0.05% | Gravimetric |
Heavy Metals (as Pb) | ≤ 0.001% | ≤ 0.002% | ≤ 0.001% | USP/EP |
| Arsenic (As) | ≤ 0.00005% | ≤ 0.0001% | ≤ 0.00005% | ICP-MS |
| Moisture Content | ≤ 0.3% | ≤ 0.5% | ≤ 0.3% | Gravimetric |
| Bulk Density (Loose) | 0.8–1.2 g/cm³ | 0.9 g/cm³ | 1.0 g/cm³ | ASTM B527 |
Physical Properties
Parameter | Specification / Typical Value | Test Method | Notes |
Appearance | White, free-flowing granules | Visual | Hard, non-dusting particles |
Granule Size Range | 0.3–1.5 mm (customizable) | Sieve Test | Optional 0.5–1.0 mm or 1.0–2.0 mm available |
| Specific Surface Area (BET) | 5–20 m²/g | BET | Lower surface area vs. powder |
Whiteness | ≥ 95% | CIE Lab | — |
| Flowability | Excellent | ASTM D1238 | No bridging or blocking |
| Oil Absorption | 20–40 g/100g | ASTM D281 | Indicates compact granule structure |
| Hardness | ≥ 3.0 N/granule | Crush Test | Stable under mechanical handling |
| Solubility | Insoluble in water; soluble in acids | — | Ideal for antacid & nutritional uses |
Key Characteristics & Functional Advantages
Stable Granular Structure: Provides dust-free handling, long storage life, and high flow efficiency.
Controlled Dissolution Rate: Ensures gradual magnesium release in acidic environments.
Compact Bulk Density: Efficient for packaging and transportation.
Excellent Dispersion: Uniform blending in powder mixes or tablet formulations.
Safe & Neutral Taste: Suitable for use in food and beverage formulations.
Antacid Functionality: Neutralizes stomach acid naturally without side effects.
Non-Hygroscopic: Resists moisture absorption under ambient humidity.
Primary Applications & Industries Served
Food and Beverage Fortification: Used as magnesium enrichment in drinks, dairy, and cereals.
Nutritional Supplements: Granular source of bioavailable magnesium in tablets or capsules.
Antacid Formulations: Effective pH regulator for digestive products.
Food Additive Applications: As stabilizer, drying agent, or anti-caking agent in powdered food products.
Functional Health Foods: Ideal for high-magnesium functional blends and meal replacements.
Feed and Pet Nutrition: Enhances magnesium levels in animal feed premixes.
Packaging, Storage & Handling
Packaging Options:
- 25 kg kraft paper bag with inner PE liner
- 500 kg or 1000 kg jumbo bag (woven PP)
- Optional moisture-proof laminated bag
Storage Conditions: Store in a cool, dry, and ventilated environment, away from moisture and CO2.
Shelf Life: 24 months in sealed packaging.
Handling Precautions:
- Avoid generating dust during transfer.
- Use protective mask, gloves, and goggles.
- Keep container tightly closed after opening.
Safety Information (Summary of SDS)
GHS Classification: Not hazardous under GHS standards.
Hazard Statements: May cause mild irritation if inhaled in large quantities.
First Aid Measures:
- Inhalation: Move to fresh air if irritation occurs.
- Eye Contact: Rinse immediately with water for several minutes.
- Skin Contact: Wash with mild soap and water.
- Ingestion: Harmless in small quantities; seek medical advice if discomfort occurs.
Quality Assurance & Customization
Manufacturing Standards: ISO 9001:2015, ISO 22000, and HACCP certified.
Testing and Traceability: Each batch supplied with Certificate of Analysis (CoA) confirming purity, granule size, and moisture.
Regulatory Compliance: Meets USP, FCC, FDA, and EU food-grade standards.
Custom Granulation Services:
- Tailored granule size (0.3–2.0 mm).
- Controlled bulk density (0.8–1.2 g/cm³).
- Optional coated or dust-free grade for specialized processing.
- Custom packaging for OEM food and nutraceutical brands.