Chemicals and Drugs

Argon

A noble gas with the atomic symbol Ar, atomic number 18, and atomic weight 39.948. It is used in fluorescent tubes and wherever an inert atmosphere is desired and nitrogen cannot be used.

National Library of MedicineMedical Subject Headings2026

Structured Summary

Abstract

A noble gas with the atomic symbol Ar, atomic number 18, and atomic weight 39.948. It is used in fluorescent tubes and wherever an inert atmosphere is desired and nitrogen cannot be used.

Chemical Identity

Chemical Information

Molecular Formula
Ar
Molecular Weight
39.9 g/mol
CAS Registry No.
7440-37-1
IUPAC Name
argon
InChIKey
XKRFYHLGVUSROY-UHFFFAOYSA-N
SMILES
[Ar]
MeSH Unique ID
D001128
Source
PubChem CID 23968

MeSH Record

Classification

Broader headings

Related Concepts

Knowledge Graph

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MeSH Record

Synonyms

2 entry terms
  • Argon-40
  • Argon 40

MeSH Record

Aspects Covered

24 allowable subheadings

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

MeSH Hierarchy

Tree Numbers

AMA Style

References

  1. National Library of Medicine. Argon. Medical Subject Headings (MeSH). 2026. Unique ID D001128. http://id.nlm.nih.gov/mesh/2026/D001128
  2. Argon. In: Wikipedia. https://en.wikipedia.org/wiki/Argon
  3. Argon. In: Wikidata. https://www.wikidata.org/wiki/Q696
  4. Argon. In: PubChem Compound. CID 23968. https://pubchem.ncbi.nlm.nih.gov/compound/23968