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.


Molar Weight40.304g/mol
Melting Point2,852 °C
Boiling Point3,600 °C
Density3.53- 3.58
FormsPowder, White

Uses and Applications

Key applications

  • Adhesives and Sealants
  • Solvents
  • Automotive
  • Batteries
  • Personal care
  • Air care products
  • Building & Construction products
  • Paint and Coatings


  • Pharma
  • Cleaning
  • Coatings & Construction
  • Polymers
  • Cosmetics
  • Water Treatment
  • Food
  • Animal Nutrition
  • Agrobusiness
  • Lubricants
  • Rubber

Synonyms: Magnesia, Periclase

Chemical Formula: MgO

CAS Number: 1309-48-4