Magnesium Hydroxide Technical

Product Overview

Magnesium Hydroxide Technical (Mg(OH)₂) is a white solid, supplied as a powder or suspension, with broad utility across pharmaceutical, chemical processing, and materials industries. The product is specified to USP-NF Monograph and ACS Reagent Grade standards, ensuring high purity and consistent performance in neutralization, buffering, and acid-scavenging applications. Typical assay ranges from 95% to 100% with a 97.5% center point by titration against standardized HCl, supporting reliable dosing in antacid formulations and pH-control processes. The material exhibits slight water solubility and a density of approximately 2.36 g/mL at 25°C, which informs formulation strategies for slurries, suspensions, and composite materials. Its low residue after ignition and controlled trace metal profile contribute to suitability for pharmaceutical-grade and heavy-metal-sensitive applications while maintaining performance in flame-retardant and filler roles in plastics and construction materials.

In addition to its chemical reactivity, magnesium hydroxide acts as a buffering and neutralizing agent, enabling controlled acid neutralization in chemical manufacturing and wastewater treatment processes. The product’s alkaline properties support pH adjustment, corrosion inhibition, and process stabilization in a range of industrial settings. Available data demonstrate strict impurity controls for chloride, nitrate, sulfate, phosphate, and trace metals, aligning with industry standards and customer requirements for purity, safety, and regulatory compliance. The material’s stability under storage conditions and compatibility with common process streams make it a reliable, technically validated choice for bulk operations and formulated products.

Key Properties

• Assay (wt%): min 95, max 100; typical 97.5; test method: Titration with standardized HCl
• Color (APHA): max 5; typical 2; test method: APHA/Hazen visual comparison
• Specific Gravity 20°C: min 2.34, max 2.40; typical 2.38; test method: Hydrometer or pycnometer at 20°C
• Residue After Ignition: max 0.5%; typical 0.2%; test method: Gravimetric analysis (ignition to constant weight)
• Chloride (ppm): max 1000; typical 300; test method: IC or ISE
• Nitrate NO₃ (ppm): max 800; typical 200; test method: IC
• Arsenic (As) (ppm): max 0.5; typical 0.1; test method: ICP-MS
• Heavy Metals (as Pb) (ppm): max 0.5; typical 0.1; test method: ICP-MS
• Magnesium (as Mg) (ppm): max 15,000; typical 4,000; test method: ICP-OES
• Water Content: max 0.5%; typical 0.2%; test method: Karl Fischer titration

Common Applications

• Antacid: Industry—Pharmaceutical; Description: Neutralizes stomach acid and Relieves indigestion with predictable buffering capacity and compatibility with standard dosage forms
• PH Adjuster: Industry—Water Treatment; Description: Used to adjust wastewater pH levels, providing controlled neutralization and buffering in treatment streams
• Flame Retardant: Industry—Construction; Description: Incorporated into materials to enhance fire resistance due to its alkaline char-forming properties
• Filler: Industry—Plastics; Description: Filler in plastic products to improve mechanical properties, dimensional stability, and processing behavior
• Neutralizing Agent: Industry—Chemical Manufacturing; Description: Acts as a neutralizing agent in various chemical reactions, providing consistent base availability

Safety Precautions

Handle Magnesium Hydroxide Technical with appropriate PPE, including chemical-resistant gloves, splash goggles, and protective clothing. Store in a cool, dry place away from moisture and incompatible materials; keep containers tightly closed to prevent contamination and moisture uptake. Maintain good ventilation in handling areas to avoid dust generation and implement standard operating procedures for unloading, transfer, and storage consistent with SDS guidance. Protect from exposure to strong acids or oxidizing agents, as reactions can release heat or cause local irritation.

For exposure management, observe standard first-aid measures: in case of eye contact, rinse cautiously with water for several minutes; remove contact lenses if present and easy to do; continue rinsing. For skin contact, wash with soap and water and seek medical advice if irritation persists. If inhaled, move the person to fresh air and maintain comfortable breathing. Ingestion requires rinsing the mouth and seeking medical attention if symptoms occur; do not induce vomiting. The product is classified with GHS: Eye Irrit. 2 and Skin Irrit. 2 signals; follow local regulatory requirements and consult the SDS for detailed emergency procedures. Transportation: UN 1760, Corrosive liquid, n.o.s., Class 8, PG II.

Benefits

✔ High Purity and Compliance – Meets USP-NF Monograph and ACS Reagent Grade specifications, ensuring dependable performance in pharmaceutical and industrial applications.
✔ Stable Neutralization Capacity – Predictable acid-neutralizing behavior with tight assay and impurity controls, enabling precise formulation and process control.