Chemicals and Drugs

Magnesium Oxide

Magnesium oxide (MgO). An inorganic compound that occurs in nature as the mineral periclase. In aqueous media combines quickly with water to form magnesium hydroxide. It is used as an antacid and mild laxative and has many nonmedicinal uses.

National Library of MedicineMedical Subject Headings2026

Structured Summary

Abstract

Magnesium oxide (MgO). An inorganic compound that occurs in nature as the mineral periclase. In aqueous media combines quickly with water to form magnesium hydroxide. It is used as an antacid and mild laxative and has many nonmedicinal uses.

Chemical Identity

Chemical Information

Molecular Formula
MgO
Molecular Weight
40.305 g/mol
CAS Registry No.
1309-48-4
IUPAC Name
oxomagnesium
InChIKey
CPLXHLVBOLITMK-UHFFFAOYSA-N
SMILES
O=[Mg]
MeSH Unique ID
D008277
Source
PubChem CID 14792

MeSH Record

Classification

Related Concepts

Knowledge Graph

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Drug Class

Pharmacological Action

MeSH Record

Synonyms

2 entry terms
  • Magnesia
  • Oxide, Magnesium

MeSH Record

Aspects Covered

24 allowable subheadings

Indexed with the subheadings administration & dosage, adverse effects, agonists, analysis, antagonists & inhibitors, blood, cerebrospinal fluid, chemical synthesis, chemistry, classification, economics, history, immunology, isolation & purification, metabolism, pharmacokinetics, pharmacology, poisoning, radiation effects, standards, supply & distribution, therapeutic use, toxicity, urine.

MeSH Record

Indexing Annotation

an antacid & cathartic

MeSH Hierarchy

Tree Numbers

AMA Style

References

  1. National Library of Medicine. Magnesium Oxide. Medical Subject Headings (MeSH). 2026. Unique ID D008277. http://id.nlm.nih.gov/mesh/2026/D008277
  2. Magnesium Oxide. In: Wikipedia. https://en.wikipedia.org/wiki/Magnesium_oxide
  3. Magnesium Oxide. In: Wikidata. https://www.wikidata.org/wiki/Q214769
  4. Magnesium Oxide. In: PubChem Compound. CID 14792. https://pubchem.ncbi.nlm.nih.gov/compound/14792