MAGNESIUM OXIDE

Magnesium Oxide is an inorganic magnesium compound widely used as a magnesium source, pH adjuster, refractory material, and functional additive in pharmaceutical, food, animal nutrition, and industrial applications.
Magnesium Oxide is commonly supplied as a white powder with high magnesium content, and Magnesium Oxide is valued for alkalinity, acid-neutralizing capacity, and broad compatibility in dry blends.
Magnesium Oxide performance depends strongly on grade, particle size, surface area, and reactivity, and Magnesium Oxide can be used in both high-purity pharmaceutical products and high-volume industrial processes.

CAS Number: 1309-48-4
EC Number: 215-171-9
Molecular Formula: MgO
Molecular Weight: 40.30 g/mol

Synonyms: Magnesium Oxide, MgO, Magnesia, Calcined Magnesia, Light Magnesium Oxide, Heavy Magnesium Oxide, Reactive Magnesium Oxide, Dead-Burned Magnesia, Pharmaceutical Magnesium Oxide, Food Grade Magnesium Oxide, Feed Grade Magnesium Oxide, Magnesium Oxide Powder, Magnesium Oxide, MgO, Magnesia, Magnesium Oxide (Light), Magnesium Oxide (Heavy), Light Magnesia, Heavy Magnesia, Calcined Magnesia, Dead Burned Magnesia, DBM (Dead Burned Magnesia), Caustic Calcined Magnesia, CCM (Caustic Calcined Magnesia), Sintered Magnesia, Fused Magnesia, Burnt Magnesia, Periclase, Periclase (Magnesium Oxide), Magnesia Powder, Magnesium Oxide Powder, Magnesium Oxide Granules, Magnesium Oxide Pellets, Magnesium Oxide Fine Powder, Magnesium Oxide Micronized, Magnesium Oxide Ultrafine, Magnesium Oxide Reagent, Magnesium Oxide Analytical Grade, Magnesium Oxide Laboratory Grade, Magnesium Oxide Technical Grade, Magnesium Oxide Industrial Grade, Magnesium Oxide Pharmaceutical Grade, Magnesium Oxide USP, Magnesium Oxide BP, Magnesium Oxide EP, Magnesium Oxide JP, Magnesium Oxide FCC, Magnesium Oxide Food Grade, Magnesium Oxide Feed Grade, Magnesium Oxide High Purity, Magnesium Oxide 98%, Magnesium Oxide 99%, Magnesium Oxide 99.5%, Magnesium Oxide (CAS 1309-48-4), CAS 1309-48-4, Magnesium Oxide (EINECS 215-171-9), EC 215-171-9, Magnesium Oxide (E530), E530, E 530, INS 530, Magnesium Oxide Antacid, Antacid Magnesium Oxide, Magnesium Oxide Laxative (use context), Magnesium Oxide Supplement, Magnesium Oxide Dietary Supplement, Magnesium Oxide Mineral Supplement, Magnesium Oxide Pharma Excipient, Magnesium Oxide Tablet Grade, Magnesium Oxide Buffering Agent, Magnesium Oxide pH Adjuster, Magnesium Oxide Alkali, Magnesium Oxide Base, Magnesium Oxide Neutralizing Agent, Magnesium Oxide Desiccant, Magnesium Oxide Drying Agent, Magnesium Oxide Catalyst Support, Magnesium Oxide Catalyst Grade, Magnesium Oxide Refractory Grade, Refractory Magnesia, Magnesia Refractory, Magnesium Oxide Furnace Lining Grade, Magnesium Oxide Kiln Lining Grade, Magnesium Oxide Electrical Grade, Magnesium Oxide Insulating Powder, Magnesium Oxide Thermal Insulator, Magnesium Oxide Heat Transfer Filler, Magnesium Oxide Rubber Grade, Magnesium Oxide Plastic Grade, Magnesium Oxide Flame Retardant Additive (use context), Magnesium Oxide Smoke Suppressant (use context), Magnesium Oxide (Magnesium(II) Oxide), Magnesium(II) Oxide

APPLICATIONS

Magnesium Oxide is used in dietary supplements as a concentrated magnesium source in tablets, capsules, and powders.
Magnesium Oxide is incorporated into multivitamin-mineral formulas to deliver elemental magnesium efficiently by weight.
Magnesium Oxide is used in antacid products to neutralize stomach acid in regulated pharmaceutical formulations.

Magnesium Oxide is used as a laxative in certain regulated products where osmotic effects are part of intended use.
Magnesium Oxide is incorporated into chewable and swallow tablets where controlled neutralizing capacity is required.
Magnesium Oxide is used in effervescent and powder formulations where alkalinity supports product design in compatible systems.

Magnesium Oxide is used in animal nutrition as a magnesium source for ruminants and other livestock.
Magnesium Oxide is incorporated into mineral premixes to support magnesium intake and metabolic function.
Magnesium Oxide is used in feed to help reduce the risk of hypomagnesemia in grazing animals under appropriate guidance.

Magnesium Oxide is used in food processing as an acidity regulator and nutrient source where permitted and properly specified.
Magnesium Oxide is incorporated into fortified foods to increase magnesium content in compatible matrices.
Magnesium Oxide is used in processing aids and dry mixes where pH adjustment is needed and solubility limitations are acceptable.

Magnesium Oxide is used as a pH adjuster in water treatment to increase alkalinity and control corrosion in distribution systems.
Magnesium Oxide is incorporated into wastewater treatment to support neutralization and precipitation in compatible processes.
Magnesium Oxide is used in industrial effluent treatment to control acidity and manage metal solubility.

Magnesium Oxide is used in agriculture to correct magnesium deficiency and adjust soil pH in compatible soil management programs.
Magnesium Oxide is incorporated into fertilizer blends as a magnesium nutrient source.
Magnesium Oxide is used in horticulture to manage pH and magnesium levels in certain growing media.

Magnesium Oxide is used in refractory products such as bricks and linings for furnaces, kilns, and steelmaking vessels.
Magnesium Oxide is incorporated into refractory castables and ramming mixes to provide high-temperature resistance.
Magnesium Oxide is used in cement and ceramics to improve thermal stability and mechanical performance in compatible formulations.

Magnesium Oxide is used in rubber compounding as an acid acceptor and activator, especially in chloroprene rubber systems.
Magnesium Oxide is incorporated into elastomers to improve processing stability and heat aging resistance.
Magnesium Oxide is used in adhesives and sealants as a filler and reactivity modifier in compatible systems.

Magnesium Oxide is used in plastics as a flame retardant synergist and smoke suppressant in selected formulations.
Magnesium Oxide is incorporated into polymer composites as a filler to improve stiffness and thermal conductivity in compatible designs.
Magnesium Oxide is used in wire and cable compounds to support heat resistance and performance.

Magnesium Oxide is used in pharmaceuticals as an excipient and processing aid to improve flow and compressibility in solid dosage forms.
Magnesium Oxide is incorporated into tablets as an alkalizing agent and acid scavenger for sensitive actives.
Magnesium Oxide is used in laboratory settings as a basic oxide for neutralization, adsorption, and catalyst support in compatible procedures.

Magnesium Oxide is valued because Magnesium Oxide provides high magnesium content, strong alkalinity, and broad industrial usefulness across health, nutrition, and high-temperature materials.

Magnesium Oxide is used as a dietary supplement to provide elemental magnesium in tablet and capsule products.
Magnesium Oxide is used in multivitamin and multimineral formulas to increase magnesium label claim efficiently.
Magnesium Oxide supports cost-effective magnesium fortification in high-dose supplement formats.

Magnesium Oxide is used as an antacid to neutralize stomach acid in over-the-counter products.
Magnesium Oxide supports relief positioning for heartburn and acid indigestion in compliant dosage forms.
Magnesium Oxide helps buffer gastric acidity when used according to directions.

Magnesium Oxide is used as a laxative in some oral preparations by providing osmotic effects at suitable doses.
Magnesium Oxide supports short-term constipation relief in regulated products.
Magnesium Oxide helps promote bowel movement in occasional-use gastrointestinal products.

Magnesium Oxide is used in animal feed as a magnesium source and rumen buffer.
Magnesium Oxide supports livestock mineral nutrition programs, especially for ruminants.
Magnesium Oxide helps reduce risk of hypomagnesemia by supplying magnesium in feed.

Magnesium Oxide is used in fertilizer and soil amendment products to correct magnesium deficiency.
Magnesium Oxide is used to increase soil pH in acidic soils as a liming-type material.
Magnesium Oxide supports improved nutrient availability and plant growth in managed agriculture.

Magnesium Oxide is used in water and wastewater treatment to raise pH and precipitate metals.
Magnesium Oxide supports alkalinity control and neutralization of acidic waters.
Magnesium Oxide helps remove dissolved heavy metals by promoting hydroxide precipitation.

Magnesium Oxide is used in flue gas treatment and air pollution control as an acid gas sorbent.
Magnesium Oxide supports capture of sulfur oxides and other acidic components in some processes.
Magnesium Oxide helps reduce corrosion and emissions by neutralizing acids.

Magnesium Oxide is used in refractory bricks and furnace linings for high-temperature applications.
Magnesium Oxide supports steelmaking, cement kilns, and glass furnaces with heat-resistant linings.
Magnesium Oxide helps maintain structural integrity under extreme thermal stress.

Magnesium Oxide is used in electrical insulation and heating elements as a thermally conductive dielectric filler.
Magnesium Oxide supports heat transfer and insulation in tubular heaters.
Magnesium Oxide helps protect heating coils while allowing efficient thermal performance.

Magnesium Oxide is used as a flame retardant and smoke suppressant additive in polymers.
Magnesium Oxide supports improved fire performance in selected plastic and rubber compounds.
Magnesium Oxide helps reduce smoke and acidic gas generation in some formulations.

Magnesium Oxide is used in rubber compounding as an activator and acid acceptor.
Magnesium Oxide supports chloroprene rubber and other elastomer curing systems.
Magnesium Oxide helps neutralize acidic byproducts and improves processing stability.

Magnesium Oxide is used in adhesive and sealant formulations as a filler and acid scavenger.
Magnesium Oxide supports viscosity control and improved stability in reactive systems.
Magnesium Oxide helps reduce corrosive acidity that can affect substrates.

Magnesium Oxide is used in coatings and paints as a pigment extender and corrosion-control additive.
Magnesium Oxide supports improved film durability in certain coating systems.
Magnesium Oxide helps neutralize acids and improve resistance to degradation.

Magnesium Oxide is used in ceramics as a flux and structural component to improve high-temperature properties.
Magnesium Oxide supports production of cordierite and other ceramic compositions.
Magnesium Oxide helps control thermal expansion and mechanical strength in fired bodies.

Magnesium Oxide is used in glass manufacturing to improve chemical durability and reduce devitrification.
Magnesium Oxide supports stabilization of glass networks in certain compositions.
Magnesium Oxide helps tune viscosity and melting behavior in glass melts.

Magnesium Oxide is used in cement and building materials to create magnesium-based binders.
Magnesium Oxide supports production of specialty cements and repair mortars.
Magnesium Oxide helps achieve fast setting and controlled expansion in certain systems.

Magnesium Oxide is used in carbon capture and mineralization research as a reactive alkaline oxide.
Magnesium Oxide supports CO₂ sequestration studies via formation of magnesium carbonates.
Magnesium Oxide helps explore low-energy routes for permanent carbon storage.

Magnesium Oxide is used in chemical manufacturing as a base and catalyst support in selected reactions.
Magnesium Oxide supports heterogeneous catalysis and adsorbent applications.
Magnesium Oxide helps provide basic sites for reactions such as transesterification in some systems.

Magnesium Oxide is used in pharmaceutical manufacturing as an excipient in some solid dosage forms.
Magnesium Oxide supports tablet flow, compression behavior, and pH microenvironment control.
Magnesium Oxide helps improve stability of acid-sensitive actives in certain formulations.

Magnesium Oxide is used in food processing as an acidity regulator and nutrient source in permitted applications.
Magnesium Oxide supports magnesium fortification in selected food categories.
Magnesium Oxide helps control pH and reduce acidity in certain processing steps.

Magnesium Oxide is used in agriculture for animal bedding and litter treatment to reduce odors and moisture.
Magnesium Oxide supports ammonia control by neutralizing acidic components.
Magnesium Oxide helps improve hygiene conditions in livestock housing.

Magnesium Oxide is used in hazardous waste stabilization and solidification to neutralize acidic wastes.
Magnesium Oxide supports immobilization of metals through pH elevation and precipitation.
Magnesium Oxide helps improve waste handling safety and regulatory compliance.

Magnesium Oxide is used in mining and metallurgical processes to control slag chemistry.
Magnesium Oxide supports slag conditioning and refractory protection in smelting operations.
Magnesium Oxide helps reduce refractory wear by optimizing slag basicity.

Magnesium Oxide is used in desulfurization of hot metal and steel in some metallurgical routes.
Magnesium Oxide supports sulfur removal reactions under high-temperature conditions.
Magnesium Oxide helps improve steel quality by reducing sulfur-related defects.

Magnesium Oxide is used in paper and pulp processing to adjust pH and support bleaching chemistry in some systems.
Magnesium Oxide supports alkalinity control during process steps requiring base addition.
Magnesium Oxide helps manage acidity and improve process stability in certain operations.

Magnesium Oxide is used in personal care products such as deodorants as an odor-absorbing powder.
Magnesium Oxide supports acid neutralization that can reduce odor formation on skin.
Magnesium Oxide helps improve dry feel and absorbency in powder-based body products.

Magnesium Oxide is used in cosmetics as a filler to improve texture and oil absorption in powders.
Magnesium Oxide supports mattifying effects in face powders and color cosmetics.
Magnesium Oxide helps improve slip and reduce greasy shine appearance.

Magnesium Oxide is used in toothpaste as a mild abrasive and alkalizing component in some formulas.
Magnesium Oxide supports cleaning performance and pH control in oral care products.
Magnesium Oxide helps reduce acidic environment that can contribute to enamel demineralization.

Magnesium Oxide is used in laboratory work as a drying agent and base in selected procedures.
Magnesium Oxide supports adsorption of acidic impurities in organic synthesis.
Magnesium Oxide helps neutralize acids during purification steps in some workflows.

Magnesium Oxide is used in catalyst regeneration and gas purification as an acid scavenger.
Magnesium Oxide supports removal of acidic gases in controlled industrial systems.
Magnesium Oxide helps protect downstream equipment from corrosion.

Magnesium Oxide is used in energy storage and battery research as a ceramic separator component.
Magnesium Oxide supports thermal stability and ionic transport studies in advanced batteries.
Magnesium Oxide helps improve safety characteristics in high-temperature electrochemical systems.

Magnesium Oxide is used in electronics packaging as a thermally conductive filler in encapsulants.
Magnesium Oxide supports heat dissipation in power electronics and LEDs.
Magnesium Oxide helps improve thermal management while maintaining electrical insulation.

Magnesium Oxide is used in polymers to improve stiffness and heat resistance as a mineral filler.
Magnesium Oxide supports reinforcement and dimensional stability in compounded plastics.
Magnesium Oxide helps tune rheology and processing behavior in extruded materials.

Magnesium Oxide is used in composting and waste odor control to neutralize acids and reduce smells.
Magnesium Oxide supports improved compost stability by buffering pH.
Magnesium Oxide helps reduce nuisance odor formation in organic waste treatment.

Magnesium Oxide is used in aquaculture and pond management to raise alkalinity and stabilize water pH.
Magnesium Oxide supports healthier aquatic conditions in controlled pond systems.
Magnesium Oxide helps reduce pH swings that stress fish and aquatic organisms.

Magnesium Oxide is used in laboratory demonstrations of basic oxides and acid-base neutralization.
Magnesium Oxide supports educational experiments showing formation of magnesium hydroxide in water.
Magnesium Oxide helps illustrate buffering, pH control, and precipitation behavior in teaching labs.

Magnesium Oxide is used in quality control testing to prepare reference suspensions and check reactivity.
Magnesium Oxide supports comparison of activity grades based on surface area and reactivity.
Magnesium Oxide helps verify supplier consistency for critical industrial applications.

Magnesium Oxide is used in fire-resistant boards and insulation materials as a mineral component.
Magnesium Oxide supports production of MgO boards and specialty panels.
Magnesium Oxide helps improve fire performance and dimensional stability in building products.

Magnesium Oxide is used in environmental remediation to immobilize contaminants via alkalinity increase.
Magnesium Oxide supports treatment of acidic soils and contaminated sediments.
Magnesium Oxide helps reduce mobility of certain metals through precipitation and adsorption.

DESCRIPTION

Magnesium Oxide is typically a white, odorless powder produced by calcination of magnesium carbonate, magnesium hydroxide, or magnesium-containing minerals.
Magnesium Oxide is sparingly soluble in water, but Magnesium Oxide reacts with water to form magnesium hydroxide and increases alkalinity in aqueous systems.
Magnesium Oxide reactivity varies widely, and surface area and calcination conditions strongly influence neutralization rate and performance in formulations.

Magnesium Oxide is widely used as an antacid because Magnesium Oxide neutralizes gastric acid and can form magnesium salts in situ.
Magnesium Oxide is used in refractory applications because Magnesium Oxide has a very high melting point and good resistance to basic slags.
Magnesium Oxide can absorb moisture and carbon dioxide from air over time, which can reduce reactivity and affect flow properties in powders.

Magnesium Oxide should be stored in tightly closed containers in a cool, dry place to minimize hydration and carbonation.
Magnesium Oxide dust can be irritating, so handling should minimize airborne particles and use appropriate PPE.
Magnesium Oxide grade selection is important because pharmaceutical, food, feed, and refractory uses have very different purity and performance specifications.

Magnesium Oxide is an inorganic oxide of magnesium commonly written as MgO.
Magnesium Oxide is typically supplied as a white, odorless powder with varying particle size and surface area.
Magnesium Oxide is produced by calcination of magnesium carbonate or magnesium hydroxide at controlled temperatures.

Magnesium Oxide reacts with water to form magnesium hydroxide, especially in more reactive “light” grades.
Magnesium Oxide has low solubility in water but strongly increases pH in aqueous suspensions.
Magnesium Oxide is a basic material that neutralizes acids and acts as an alkalinity source.

Magnesium Oxide grades vary widely, including light, heavy, and dead-burned forms with different reactivity.
Magnesium Oxide refractory grades are sintered at high temperature to produce dense, low-reactivity material.
Magnesium Oxide high-surface-area grades are more reactive and are used in chemical and pharma applications.

Magnesium Oxide has high melting point and strong thermal stability, making it suitable for refractory uses.
Magnesium Oxide has good thermal conductivity and electrical insulating properties in dry form.
Magnesium Oxide can absorb moisture and carbon dioxide over time, forming hydroxide and carbonate on the surface.

Magnesium Oxide dust can irritate eyes and respiratory tract, so dust control is important.
Magnesium Oxide should be stored in tightly closed containers to minimize moisture uptake and caking.
Magnesium Oxide specifications often include purity, loss on ignition, surface area, and heavy metal limits depending on grade.

Magnesium Oxide is widely used due to versatility as a base, refractory material, and magnesium source.
Magnesium Oxide performance depends strongly on calcination conditions, particle morphology, and surface chemistry.
Magnesium Oxide is valued for reliable alkalinity, heat resistance, and broad industrial compatibility.

PROPERTIES

Chemical Formula: MgO
Molecular Weight: 40.30 g/mol
Common Name: Magnesium Oxide
Chemical Type: Basic inorganic oxide
Appearance: White powder
Odor: Odorless
Solubility: Sparingly soluble in water; reacts to form Mg(OH)2; soluble in acids
pH (aqueous suspension): Strongly alkaline (concentration dependent)
Density: ~3.5 g/cm³ (true density; grade dependent)
Bulk Density: Grade dependent (light vs heavy MgO)
Melting Point: ~2852°C (typical)
Surface Area: Grade dependent; reactive grades have higher surface area
Reactivity: Grade dependent; neutralization rate varies by calcination conditions
Stability: Stable under dry conditions; absorbs moisture and CO2 over time
Storage Temperature: 15–25°C, dry, tightly closed
Shelf Life: Typically 24–36 months in original sealed packaging (supplier dependent)

FIRST AID

Inhalation:
Move to fresh air if dust is inhaled.
Seek medical attention if respiratory irritation persists.
Avoid breathing dust during handling and powder transfer.

Skin Contact:
Wash with soap and water after contact.
Remove contaminated clothing and wash before reuse.
Seek medical advice if irritation develops or persists.

Eye Contact:
Rinse cautiously with water for several minutes.
Remove contact lenses if present and easy to do, then continue rinsing.
Seek medical attention if irritation persists.

Ingestion:
Rinse mouth with water.
Seek medical attention if discomfort occurs or if a large amount is swallowed.
Never give anything by mouth to an unconscious person.

Note to Physicians:
Treat symptomatically.
Monitor for electrolyte effects if very large ingestion is suspected.
Provide supportive care based on exposure route and symptoms.

HANDLING AND STORAGE

Handling:
Use appropriate PPE including gloves and safety glasses, and use dust protection as needed.
Avoid generating dust and avoid inhalation of fine powder.
Wash hands after handling and before eating, drinking, or smoking.

Ventilation:
Use local exhaust or general ventilation where dust may be generated.
Maintain good airflow during charging, mixing, and packaging operations.
Minimize airborne particulate accumulation in enclosed areas.

Storage:
Store in tightly closed containers in a cool, dry place.
Protect from humidity and carbon dioxide exposure to reduce hydration and carbonation.
Keep containers properly labeled and protected from contamination and moisture.

Spill and Leak Procedures:
Avoid dust generation and sweep or vacuum using equipment designed for fine powders.
Place collected material into suitable containers for disposal according to local regulations.
Clean the area with wet wiping if needed to reduce dust dispersion and residue.

Handling Precautions:
Select the correct grade based on reactivity, particle size, and purity requirements for the application.
Control humidity in storage areas to maintain consistent performance and flow properties.
Rotate stock using FIFO practices to maintain consistent quality and reactivity.