Structured Summary
Abstract
A noble gas with the atomic symbol He, atomic number 2, and atomic weight 4.003. It is a colorless, odorless, tasteless gas that is not combustible and does not support combustion. It was first detected in the sun and is now obtained from natural gas. Medically it is used as a diluent for other gases, being especially useful with oxygen in the treatment of certain cases of respiratory obstruction, and as a vehicle for general anesthetics.
Chemical Identity
Chemical Information
- Molecular Formula
- He
- Molecular Weight
- 4.00260 g/mol
- CAS Registry No.
- 7440-59-7
- IUPAC Name
- helium
- InChIKey
- SWQJXJOGLNCZEY-UHFFFAOYSA-N
- SMILES
- [He]
- MeSH Unique ID
- D006371
- Source
- PubChem CID 23987
MeSH Record
Classification
Broader headings
Related Concepts
Knowledge Graph
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MeSH Record
Synonyms
2 entry terms
- Helium-4
- Helium 4
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
- National Library of Medicine. Helium. Medical Subject Headings (MeSH). 2026. Unique ID D006371. http://id.nlm.nih.gov/mesh/2026/D006371
- Helium. In: Wikipedia. https://en.wikipedia.org/wiki/Helium
- Helium. In: Wikidata. https://www.wikidata.org/wiki/Q560
- Helium. In: PubChem Compound. CID 23987. https://pubchem.ncbi.nlm.nih.gov/compound/23987