Product Overview & Executive Summary
USP Grade Magnesium Hydroxide Powder - Product Datasheet & Specifications
Product Name: USP Grade Magnesium Hydroxide Powder
Synonym: Magnesite Hydroxide Powder, Mg(OH)2 Powder, USP Mg(OH)2
Chemical Formula: Mg(OH)2
CAS Number: 1309-42-8
EINECS Number: 215-170-3
Product Description
High Purity Magnesium Hydroxide Powder is produced via chemical precipitation from magnesium salts, followed by filtration, washing, drying, and high-precision milling. The resulting powder features ultra-fine, uniform particles, high purity (>99% Mg(OH)2), and low heavy metal content, making it suitable for stringent industrial and food-grade applications.
The powder's high specific surface area (50–100 m²/g) and controlled particle size (D50 2–10 μm) provide excellent reactivity, dispersibility, and adsorption properties. Its low moisture content (<0.5%) and non-caking nature ensure long shelf life, easy handling, and reliable incorporation into liquid or solid matrices.
High Purity Magnesium Hydroxide Powder also serves as a precursor for magnesium oxide production, a pH regulator, and a neutralizing agent in both environmental and food applications, providing versatility across multiple industries.
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Key Features
USP Grade Mg(OH)2: Magnesium hydroxide content ≥ 99%, ensuring excellent chemical stability.
Ultra-Fine Powder: D50 2–10 μm for uniform dispersion and fast reactivity.
Enhanced Flowability: Suitable for automated feeding, mixing, and compounding.
High Surface Area: Promotes adsorption, neutralization, and flame retardant efficiency.
Stable Powder: Resistant to moisture, CO2, and atmospheric degradation.
Customizable Particle Size & Bulk Density: Tailored to specific application requirements.
Regulatory Compliance: Meets ISO, USP, FCC, and food-grade standards.
Low Heavy Metals: Safe for pharmaceutical, food, and feed applications.
Detailed Technical Specifications & Analytical
Chemical Composition & Purity
| Parameter | Specification | Standard Grade | High Purity Grade | Test Method |
Magnesium Hydroxide (Mg(OH)2) | ≥ 99% | 98.5–99% | ≥ 99.5% | Gravimetric |
| Loss on Ignition (LOI) | ≤ 2.5% | 2.0% | 1.5% | 950°C ± 25°C |
Calcium Oxide (CaO) | ≤ 0.8% | 0.5% | ≤ 0.3% | ICP-OES |
Iron (as Fe2O3) | ≤ 0.05% | 0.03% | ≤ 0.01% | Colorimetric |
Chlorides (as Cl) | ≤ 0.05% | 0.03% | ≤ 0.02% | Potentiometric |
Sulfates (as SO4) | ≤ 0.10% | 0.08% | ≤ 0.05% | Gravimetric |
| Heavy Metals (as Pb) | ≤ 0.002% | Complies | ≤ 0.001% | USP/EP |
| Arsenic (As) | ≤ 0.0001% | Complies | ≤ 0.00005% | ICP-MS |
| SiO2 | ≤ 0.1% | 0.08% | ≤ 0.05% | XRF |
| Moisture Content | ≤ 0.5% | 0.4% | ≤ 0.3% | Gravimetric |
Physical Properties
Parameter | Specification / Typical Value | Test Method | Notes |
Appearance | White, fine, powder | Visual | Smooth, non-caking surface |
Bulk Density (Loose) | 0.3–0.5 g/cm³ | ASTM B527 | Adjustable via milling |
| Tapped Density | 0.5–0.8 g/cm³ | ASTM B527 | — |
| Particle Size Range (D50) | 2–10 μm (customizable) | Laser Diff. | Other sizes available on request |
| Specific Surface Area (BET) | 50–100 m²/g | BET | High surface area for reactivity |
Whiteness | ≥ 95% | CIE Lab | — |
| Oil Absorption | 40–70 g/100g | ASTM D281 | Indicates porosity |
| Solubility | Practically insoluble in water | — | Soluble in acids |
| Flowability | Excellent | ASTM D281 | Ensures uniform dosing |
| Refractoriness | ≥ 1000°C | Furnace Test | Moderate thermal resistance |
Key Characteristics & Functional Advantages
High Purity & Food Safety: Minimal heavy metals, compliant with food and pharmaceutical standards.
High Surface Area: Enhances adsorption, neutralization, and flame retardant efficiency.
Uniform Particle Size: Consistent reactivity and dispersibility in liquid or solid matrices.
Stable Powder: Resistant to moisture, caking, and environmental degradation.
Controlled Reactivity: Optimized for pH regulation, environmental neutralization, or food additive applications.
Enhanced Handling & Dosing: Ideal for automated systems and large-scale production.
Primary Applications & Industries Served
Flame Retardant Systems: Used as halogen-free flame retardant additive in plastics, rubber, and coatings.
Environmental & Water Treatment: Neutralizes acidic water and removes heavy metal ions.
Food & Nutritional Supplements: Provides magnesium in fortified foods, beverages, and dietary supplements.
Pharmaceutical Excipients: Used in tablets and antacids as active or inactive ingredient.
Cosmetics & Personal Care: Functions as pH regulator and mild abrasive in certain formulations.
Chemical Intermediates: Precursor for magnesium oxide and other magnesium derivatives.
Packaging, Storage & Handling
Packaging Options: 25 kg kraft paper bags with PE liner, 500/1000 kg big bags; vacuum-sealed packaging available.
Storage: Store in cool, dry, ventilated area, away from moisture and CO2.
Shelf Life: 24 months if sealed.
Handling Precautions: Avoid dust inhalation; wear 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) confirming purity and physical properties.
Regulatory Compliance: Meets REACH, RoHS, USP, FCC, ISO standards for industrial, food, and pharmaceutical use.
Customization Services:
- Tailored particle size distribution (2–20 μm D50).
- Adjustable bulk density, surface area, and flowability.
- Surface modifications for enhanced dispersibility.
- Calcination and precipitation adjustments for controlled reactivity.