Chemicals and Drugs

o-Chlorobenzylidenemalonitrile

A riot control agent which causes temporary irritation of the eyes and the mucosal surface of the respiratory tract. It is a more potent irritant than OMEGA-CHLOROACETOPHENONE, but less incapacitating.

National Library of MedicineMedical Subject Headings2026

Structured Summary

Abstract

A riot control agent which causes temporary irritation of the eyes and the mucosal surface of the respiratory tract. It is a more potent irritant than OMEGA-CHLOROACETOPHENONE, but less incapacitating.

Chemical Identity

Chemical Information

Molecular Formula
C10H5ClN2
Molecular Weight
188.61 g/mol
CAS Registry No.
2698-41-1
IUPAC Name
2-[(2-chlorophenyl)methylidene]propanedinitrile
InChIKey
JJNZXLAFIPKXIG-UHFFFAOYSA-N
SMILES
C1=CC=C(C(=C1)C=C(C#N)C#N)Cl
MeSH Unique ID
D009763
Source
PubChem CID 17604

MeSH Record

Classification

Broader headings

Related Concepts

Knowledge Graph

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Drug Class

Pharmacological Action

MeSH Record

Synonyms

19 entry terms
  • 2-Chlorobenzylidene Malonitrile
  • 2-Chlorobenzylidenemalonitrile
  • CS Tear Gas
  • o-Chlorobenzylidene Malonitrile
  • o-Chlorobenzylidene malonotrile
  • ortho-Chlorobenzylidene Malonitrile
  • ortho-Chlorobenzylidenemalonitrile
  • 2 Chlorobenzylidene Malonitrile
  • 2 Chlorobenzylidenemalonitrile
  • Malonitrile, 2-Chlorobenzylidene
  • Malonitrile, o-Chlorobenzylidene
  • Malonitrile, ortho-Chlorobenzylidene
  • Tear Gas, CS
  • malonotrile, o-Chlorobenzylidene
  • o Chlorobenzylidene Malonitrile
  • o Chlorobenzylidene malonotrile
  • o Chlorobenzylidenemalonitrile
  • ortho Chlorobenzylidene Malonitrile
  • ortho Chlorobenzylidenemalonitrile

MeSH Record

Aspects Covered

25 allowable subheadings

Indexed with the subheadings administration & dosage, adverse effects, agonists, analogs & derivatives, 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

History Note

91(75); was O-CHLOROBENZYLIDENE MALONITRILE see under NITRILES 1975-90

MeSH Record

Previous Indexing

  • Benzyl Compounds (1972-1974)
  • Nitriles (1970-1974)

MeSH Hierarchy

Tree Number

  1. D02w.626w.310w

AMA Style

References

  1. National Library of Medicine. o-Chlorobenzylidenemalonitrile. Medical Subject Headings (MeSH). 2026. Unique ID D009763. http://id.nlm.nih.gov/mesh/2026/D009763
  2. o-Chlorobenzylidenemalonitrile. In: Wikipedia. https://en.wikipedia.org/wiki/CS_gas
  3. o-Chlorobenzylidenemalonitrile. In: Wikidata. https://www.wikidata.org/wiki/Q209357
  4. o-Chlorobenzylidenemalonitrile. In: PubChem Compound. CID 17604. https://pubchem.ncbi.nlm.nih.gov/compound/17604