Chemicals and Drugs

Methyl Parathion

The methyl homolog of parathion. An effective, but highly toxic, organothiophosphate insecticide and cholinesterase inhibitor.

National Library of MedicineMedical Subject Headings2026

Structured Summary

Abstract

The methyl homolog of parathion. An effective, but highly toxic, organothiophosphate insecticide and cholinesterase inhibitor.

Chemical Identity

Chemical Information

Molecular Formula
C8H10NO5PS
Molecular Weight
263.21 g/mol
CAS Registry No.
298-00-0
IUPAC Name
dimethoxy-(4-nitrophenoxy)-sulfanylidene-lambda5-phosphane
InChIKey
RLBIQVVOMOPOHC-UHFFFAOYSA-N
SMILES
COP(=S)(OC)OC1=CC=C(C=C1)[N+](=O)[O-]
MeSH Unique ID
D008743
Source
PubChem CID 4130

MeSH Record

Classification

Broader headings

Related Concepts

Knowledge Graph

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Drug Class

Pharmacological Action

MeSH Record

Synonyms

7 entry terms
  • Metaphos
  • Methylparathion
  • Parathion Methyl
  • Dalf
  • Metacid 50
  • Vofatox
  • Wofatox

MeSH Record

Aspects Covered

24 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, radiation effects, standards, supply & distribution, therapeutic use, toxicity, urine.

MeSH Record

Indexing Annotation

for use to kill or control insects, use no qualifiers on the insecticide or the insect; appropriate qualifiers may be used when other aspects of the insecticide are discussed such as the effect on a physiologic process or behavioral aspect of the insect; for poisoning, coordinate with ORGANOPHOSPHATE POISONING

MeSH Record

History Note

91(75); was see under PARATHION 1975-90

MeSH Record

Previous Indexing

  • Parathion (1973-1974)

MeSH Hierarchy

Tree Numbers

  1. D02w.705w.400w.625w.600w.500w
  2. D02w.705w.539.345w.600w.500w
  3. D02w.886w.300.692w.600w.500w

AMA Style

References

  1. National Library of Medicine. Methyl Parathion. Medical Subject Headings (MeSH). 2026. Unique ID D008743. http://id.nlm.nih.gov/mesh/2026/D008743
  2. Methyl Parathion. In: Wikipedia. https://en.wikipedia.org/wiki/Parathion_methyl
  3. Methyl Parathion. In: Wikidata. https://www.wikidata.org/wiki/Q421693
  4. Methyl Parathion. In: PubChem Compound. CID 4130. https://pubchem.ncbi.nlm.nih.gov/compound/4130