Chemicals and Drugs

Hydrogen Cyanide

Hydrogen cyanide (HCN); A toxic liquid or colorless gas. It is found in the smoke of various tobacco products and released by combustion of nitrogen-containing organic materials.

National Library of MedicineMedical Subject Headings2026

Structured Summary

Abstract

Hydrogen cyanide (HCN); A toxic liquid or colorless gas. It is found in the smoke of various tobacco products and released by combustion of nitrogen-containing organic materials.

Chemical Identity

Chemical Information

Molecular Formula
CHN
Molecular Weight
27.025 g/mol
CAS Registry No.
74-90-8
IUPAC Name
formonitrile
InChIKey
LELOWRISYMNNSU-UHFFFAOYSA-N
SMILES
C#N
MeSH Unique ID
D006856
Source
PubChem CID 768

MeSH Record

Classification

Narrower headings

Related Concepts

Knowledge Graph

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Drug Class

Pharmacological Action

MeSH Record

Synonyms

4 entry terms
  • Hydrocyanic Acid
  • Acid, Hydrocyanic
  • Cyanide, Hydrogen
  • Zyklon B

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

toxic liquid or gas; /analogs = CYANIDES

MeSH Record

History Note

94; was HYDROCYANIC ACID 1963-93; HYDROGEN CYANIDE was see HYDROCYANIC ACID 1978-93

MeSH Hierarchy

Tree Numbers

AMA Style

References

  1. National Library of Medicine. Hydrogen Cyanide. Medical Subject Headings (MeSH). 2026. Unique ID D006856. http://id.nlm.nih.gov/mesh/2026/D006856
  2. Hydrogen Cyanide. In: Wikipedia. https://en.wikipedia.org/wiki/Hydrogen_cyanide
  3. Hydrogen Cyanide. In: Wikidata. https://www.wikidata.org/wiki/Q26075
  4. Hydrogen Cyanide. In: PubChem Compound. CID 768. https://pubchem.ncbi.nlm.nih.gov/compound/768