Chemicals and Drugs

Paraquat

A poisonous dipyridilium compound used as contact herbicide. Contact with concentrated solutions causes irritation of the skin, cracking and shedding of the nails, and delayed healing of cuts and wounds.

National Library of MedicineMedical Subject Headings2026

Structured Summary

Abstract

A poisonous dipyridilium compound used as contact herbicide. Contact with concentrated solutions causes irritation of the skin, cracking and shedding of the nails, and delayed healing of cuts and wounds.

Chemical Identity

Chemical Information

Molecular Formula
C12H14Cl2N2
Molecular Weight
257.16 g/mol
CAS Registry No.
1910-42-5
IUPAC Name
1-methyl-4-(1-methylpyridin-1-ium-4-yl)pyridin-1-ium dichloride
InChIKey
FIKAKWIAUPDISJ-UHFFFAOYSA-L
SMILES
C[N+]1=CC=C(C=C1)C2=CC=[N+](C=C2)C.[Cl-].[Cl-]
MeSH Unique ID
D010269
Source
PubChem CID 15938

MeSH Record

Classification

Broader headings

Related Concepts

Knowledge Graph

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Drug Class

Pharmacological Action

MeSH Record

Synonyms

4 entry terms
  • Methyl Viologen
  • Viologen, Methyl
  • Gramoxone
  • Paragreen A

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

73(71)

MeSH Record

Previous Indexing

  • Herbicides (1966-1970)
  • Pyridinium Compounds (1968-1970)

MeSH Hierarchy

Tree Number

AMA Style

References

  1. National Library of Medicine. Paraquat. Medical Subject Headings (MeSH). 2026. Unique ID D010269. http://id.nlm.nih.gov/mesh/2026/D010269
  2. Paraquat. In: Wikipedia. https://en.wikipedia.org/wiki/Paraquat
  3. Paraquat. In: Wikidata. https://www.wikidata.org/wiki/Q409669
  4. Paraquat. In: PubChem Compound. CID 15938. https://pubchem.ncbi.nlm.nih.gov/compound/15938