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MgO

Magnesium oxide

IUPAC : Magnesium oxide
OxideMineralIndustrialPharmaceuticalMineral/geological

A quintessential refractory oxide (one of the highest melting points among oxides). Used as a furnace lining material, as an antacid and as a magnesium dietary supplement.

3D ball-and-stick representation of Magnesium oxide (formula MgO). Constituent atoms: Mg, O.
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Physical properties

Molar mass40.304 g/mol
State at 20 °Csolid
Density3.58 g/cm³
Melting point3125.00 K (2852 °C)
Boiling point3873.00 K (3600 °C)
Solubility (H₂O)0.086 g/100 mL à 30 °C

Structure

Crystal systemCubic
3D render modeBall-and-stick

Uses and applications

  • Refractory lining (steel furnaces, cement kilns)
  • Pharmacy antacid (milk of magnesia)
  • Dietary supplement (magnesium)
  • Gymnastics chalk (improves grip)
  • High-temperature thermal insulation

Constituent elements

12Mg
Magnesium
8O
Oxygen

References

PubChem CID14792
CAS1309-48-4
SMILES[Mg]=O
Sources : PubChem CID 14792 · CRC Handbook of Chemistry and Physics