MAGNESIUM OXIDE- ▸ Refractories and insulation: Component of firebrick, crucibles, and electrical heating elements
- ▸ Animal feed and fertilizer: Magnesium additive for feeds and soil amendments
- ▸ Rubber compounding: Acid acceptor and processing aid
- ▸ Food grade: Anticaking and pH-regulating additive
- ▸ Process chemistry: pH control and acid neutralization in pulp, paper, and petroleum
A grade-specific Safety Data Sheet (SDS) — with the complete hazard classification, handling precautions, and transport information — is supplied with every shipment and available on request. Confirm all safety and regulatory details against the SDS for your specific grade.
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Magnesium oxide (light) is a versatile industrial mineral oxide used in refractories, rubber, flame retardancy, water treatment and agriculture — supplied as a light, low-bulk-density grade. Identity: CAS 1309-48-4.
What it is
Magnesium oxide (CAS 1309-48-4, MgO) is a white powder produced here as a light, high-surface-area grade. Light MgO is more reactive than dead-burned or fused grades, which suits chemical and rubber applications.
Industrial uses
It is used as an acid acceptor and vulcanization aid in rubber (notably CR/neoprene and ACM), a refractory and insulating material, a halogen-free flame retardant/smoke suppressant and acid scavenger in polymers, a pH-control and heavy-metal-precipitation agent in water and wastewater treatment, and a magnesium source in fertilizer and animal-nutrition (industrial) and as a desulfurization agent.
Forms, grades and handling
Light magnesium oxide is supplied as a low-bulk-density powder in bags and bulk; reactivity grade matters — specify the application. Grade (light vs heavy/dead-burned) and reactivity must match the use. Properties are typical reference values; the Certificate of Analysis (CoA) for the lot you buy governs. Always consult the current Safety Data Sheet (SDS) before handling, and confirm regulatory status and suitability for your application and jurisdiction. Each lot ships with CoA, TDS and SDS.
Bulk supply and RFQ
RawSource sources Magnesium Oxide direct from producers in bulk, with CoA, TDS and SDS per lot. Tell us the grade, particle size or specification and quantity you need, and we will quote it. Products are sold for industrial and professional use.
Typical Properties
Typical reference values, not a specification; the Certificate of Analysis (CoA) for the lot governs.
| Property | Typical Value |
|---|---|
| Chemical / class | Inorganic magnesium compound |
| CAS Number | 1309-48-4 |
| Molecular Formula | MgO |
| Molecular Weight | 40.305 g/mol |
| Handling | Refer to the current SDS |
Frequently Asked Questions
What is light magnesium oxide used for?
Light magnesium oxide (CAS 1309-48-4) is used as an acid acceptor/vulcanization aid in rubber, a refractory and insulating material, a halogen-free flame retardant and acid scavenger in polymers, a pH-control agent in water/wastewater treatment, and a magnesium source in fertilizer. RawSource supplies it for industrial use.
What is the difference between light and heavy magnesium oxide?
Light MgO has low bulk density and high surface area/reactivity (favored in rubber and chemical uses), while heavy or dead-burned MgO is denser and less reactive (favored in refractories). Specify the grade for your application.
How is bulk magnesium oxide supplied and quoted?
RawSource supplies magnesium oxide in bulk with CoA, TDS and SDS per lot. Pricing is quote-based on grade, particle size/specification and volume; submit an RFQ with your application and quantity.
Disclaimer. Information on this page — including chemical properties, identifiers, hazard, transport (DOT/UN) and tariff (HS) classifications, and applications — is provided for general reference and is compiled from authoritative public sources (e.g. PubChem). Values are typical and are not a guaranteed specification; the Certificate of Analysis (CoA) for the lot you purchase governs. Products are sold for industrial and professional use only. Nothing here is a medical, health, or efficacy claim, or advice. Always consult the current Safety Data Sheet (SDS) before handling, storage, transport or disposal, and confirm regulatory status, classification and suitability for your application and jurisdiction. Hazard, transport and tariff classifications must be verified for your specific shipment. RawSource makes no warranty, express or implied, and assumes no liability for use of this information.