Magnesium oxide
CAS 1309-48-4MgO40.305 g/mol
IUPAC: oxomagnesium
PubChem
Physical & Chemical Properties
| Melting Point | 5072 °F (NIOSH, 2024) |
| Boiling Point | 6512 °F at 760 mmHg (NIOSH, 2024) |
| Density | 3.58 (NIOSH, 2024) - Denser than water; will sink |
| Solubility | 0.009 % at 86 °F (NIOSH, 2024) |
| Vapor Pressure | 0 mmHg (approx) (NIOSH, 2024) |
| pH | pH = 10.3 (saturated aqueous solution) |
| Appearance | Magnesium oxide appears as a white solid, often found as a powder. When fine particles of magnesium oxide are dispersed in air, whether directly or when generated by the burning or cutting of magnesium metal, the resulting magnesium oxide fume is an inhalation hazard. |
Data: PubChem · Last updated: 4/20/2026
GHS Classification
No GHS classification data available.
Classification data is sourced from ECHA.
Regulatory Compliance
TSCA
Listed
note: Status based on EPA TSCA Active Inventory · inventory name: TSCA Chemical Substance Inventory
View sourceGlobal Trade Intelligence
No trade flow data available for this chemical.
HS Code(s): 2519
Data: UN Comtrade
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