What is Magnesium Oxide

A principal fireproofing ingredient in construction materials, its high thermal conductivity makes it extremely useful in refractories. It is used extensively in soil and groundwater remediation, wastewater treatment, drinking water treatment, air emissions treatment, and waste treatment industries. One of its principal uses is as a component in dry cement production.

  • Synonyms: Magnesia, Periclase
  • INCI: Magnesium Oxide
  • Chemical Formula: MgO
  • CAS Number: 1309-48-4

Product Specifications

Chemical Formula MgO
CAS Number 1309-48-4
Molar Weight 40.304g/mol
Specific Gravity 3.53- 3.58
Melting Point 2,852 °C
Boiling Point 3,600 °C
Forms White powder
Grades Feed Food Pharma Technical
Variations Granular Powder

Uses and Applications for Magnesium Oxide

Key Applications

  • Abrasives
  • Adhesives and sealants
  • Air care products
  • Automotive care products
  • Batteries
  • Building and construction
  • Cement
  • Paints and coatings
  • Personal care


  • Water Treatment
  • Food and Nutrition
  • Solvents
  • Polymers
  • Pharma
  • Cleaning
  • Rubber
  • Lubricants
  • Cosmetics
  • Agriculture
  • Animal Nutrition
  • Coatings & Construction

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