Products Description of Magnesium oxide CAS#1309-48-4
Magnesium oxide (MgO), commonly named magnesia, is an alkaline earth metal oxide presenting as white powder. Key properties: melting point 2852℃, boiling point 3600℃, relative density 3.58 (25℃); soluble in acids/ammonium salt solutions, reacts slowly with water to form Mg(OH)₂, dissolves in CO₂ aqueous solution to generate Mg(HCO₃)₂; absorbs atmospheric H₂O and CO₂ gradually, emits irritating fumes when heated.
Raw materials for production: magnesite (MgCO₃), dolomite (MgCO₃·CaCO₃), seawater, and magnesium chloride brine blocks (from seawater/brine after bromine extraction). Production processes include thermal decomposition of magnesite/dolomite, calcination of Mg(OH)₂ (from seawater-slaked lime reaction), and calcination of Mg(OH)₂/basic MgCO₃ (from brine block reaction with NaOH/Na₂CO₃). China mainly utilizes magnesite, dolomite, brine, or brine blocks.
Magnesium oxide is the highest-output magnesium compound, accounting for ~75% of magnesium industrial products (Chemicalbook). Grades and applications by calcination temperature:
Below 900℃ (light MgO): Low density, large specific surface area, strong adsorption. Uses: catalyst, rubber filler/accelerator, magnesium cement component, building material flame retardant, pharmaceutical antacid/laxative (for hyperacidity, gastroduodenal ulcers; combined with CaCO₃), feed additive, fertilizer.
950–1050℃ (light MgO): Higher density, optimized particle distribution, good water reactivity. Use: silicon steel sheet isolating agent (forms MgSiO₃ film with surface SiO₂ to prevent sintering/adhesion).
1500–1800℃ (heavy MgO): High density, small specific surface area, thermal stability, low reactivity/hydration rate. Uses: high-temperature refractory material, binder for refractory crucibles/furnace linings.
Parameters
Melting point | 2852 °C (lit.) |
Boiling point | 3600 °C |
density | 3.58 |
bulk density | 100kg/m3 |
refractive index | 1.736 |
Fp | 3600°C |
storage temp. | no restrictions. |
solubility | 5 M HCl: 0.1 M at 20 °C, clear, colorless |
form | nanopowder |
color | White |
Specific Gravity | 3.58 |
Odor | wh. powd. or cryst., odorless |
PH | 10.3 (H2O, 20℃)(saturated solution) |
Resistivity | 1.3 ∞ 10*15 (ρ/μΩ.cm) |
Water Solubility | |
semiconductor properties | <111> |
Crystal Structure | Cubic |
Sensitive | Air Sensitive |
λmax | λ: 260 nm Amax: ≤0.040 |
Merck | 14,5677 |
crystal system | Cube |
Space group | Fm3m |
Lattice constant | a/nmb/nmc/nmα/oβ/oγ/oV/nm30.42270.42270.42279090900.0755 |
Dielectric constant | 9.7（0.0℃） |
Exposure limits | ACGIH: TWA 10 mg/m3 |
Stability: | Stable. Incompatible with bromine trifluoride, bromine trichloride, phosphorus pentachloride. |
InChIKey | CPLXHLVBOLITMK-UHFFFAOYSA-N |
CAS DataBase Reference | 1309-48-4(CAS DataBase Reference) |
NIST Chemistry Reference | Magnesium monoxide(1309-48-4) |
EPA Substance Registry System | Magnesium oxide (1309-48-4) |
Safety Information
HS Code | 25199099 |
Hazardous Substances Data | 1309-48-4(Hazardous Substances Data) |
Toxicity | TCLo inhalation in human: 400mg/m3 |
IDLA | 750 mg/m3 |
Products Description of Magnesium oxide CAS#1309-48-4
Inorganic chemical products, inorganic salts, common analytical reagents, standard substances, biochemical reagents, magnesium compounds (CJ category), light metals, catalysis and inorganic chemistry, gastrointestinal drugs, active pharmaceutical ingredients (APIs), food additives, pharmaceutical excipients, other biochemical reagents, nutritional enhancers, organic chemical raw materials, coating materials, metal oxides, inorganic chemistry, general reagents, inorganic nanomaterials, magnesium, oxides, inorganic compounds and salts, solvents, organic chemistry, pharmaceutical raw materials, special-purpose reagents, organic solvent chemical products, conventional magnesium oxide powder, chemical raw materials, chemical products, raw materials, magnesium oxide (oxide category), inorganic acids
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