Magnesium oxide (MgO) is an inorganic ionic compound that appears as a white solid at room temperature. Naturally occurring as periclase, it serves as a primary raw material for magnesium smelting. Magnesium oxide exhibits exceptional fire-resistant and insulation properties, transforming into crystalline structures when heated above 1000°C. At temperatures between 1500-2000°C, it becomes dead-burned magnesia or sintered magnesium oxide.

Magnesium oxide is categorized into two main types:

• Light Magnesium Oxide: White amorphous powder with loose volume (density 3.58g/cm³). Odorless, tasteless, and non-toxic. Insoluble in pure water and organic solvents, though solubility increases with carbon dioxide presence. Forms crystalline structures under high temperatures and reacts with atmospheric CO₂ to create magnesium carbonate complexes.
• Heavy Magnesium Oxide: Dense white or beige powder that readily absorbs water and CO₂ from air. Forms gels when mixed with magnesium chloride solutions, making it suitable for various industrial applications.

Magnesium oxide serves diverse industrial purposes:

• Determining sulfur/pyrite content in coal and steel analysis
• Raw material for ceramics, enamel, refractory crucibles, and bricks
• Polishing agent, adhesive, paper coating, and rubber industry activator
• Medical applications as antacid and laxative preparations
• Catalyst and precursor for magnesium salt production
• Construction materials including artificial marble and soundproofing panels
• Rice milling industry applications and plastic manufacturing filler

Manufactured through multiple processes including carbonation, magnesium hydroxide calcination, soda ash, and ammonium bicarbonate methods. Selection depends on downstream requirements - carbonation produces lightweight MgO while hydroxide calcination yields high-purity variants.

Composed of Mg²⁺ and O²⁻ ions forming stable ionic crystal lattices. Exhibits superior thermal stability compared to silicate cement and lime, making it the preferred metal stabilizer due to excellent buffering capacity, cost efficiency, and operational safety.

Stored in cool, ventilated areas away from direct sunlight and heat sources. Packaging complies with HG/T 2573-2012 standards to prevent leakage and damage during transport.

• Industrial Protection: Operators must wear dust masks, chemical goggles, protective clothing, and rubber gloves
• Medical Use: Strictly follow prescribed dosages to prevent adverse effects
• Environmental Safety: Implement emergency protocols for potential leaks during storage/transport