Chemicals and Drugs

Agent Orange

A herbicide that contains equal parts of 2,4-dichlorophenoxyacetic acid (2,4-D) and 2,4,5-trichlorophenoxyacetic acid (2,4,5-T), as well as traces of the contaminant 2,3,7,8-tetrachlorodibenzo-p-dioxin.

National Library of MedicineMedical Subject Headings2026

Structured Summary

Abstract

A herbicide that contains equal parts of 2,4-dichlorophenoxyacetic acid (2,4-D) and 2,4,5-trichlorophenoxyacetic acid (2,4,5-T), as well as traces of the contaminant 2,3,7,8-tetrachlorodibenzo-p-dioxin.

Chemical Identity

Chemical Information

Molecular Formula
C24H27Cl5O6
Molecular Weight
588.7 g/mol
CAS Registry No.
39277-47-9
IUPAC Name
butyl 2-(2,4-dichlorophenoxy)acetate;butyl 2-(2,4,5-trichlorophenoxy)acetate
InChIKey
OLAOGBRYSBMLAO-UHFFFAOYSA-N
SMILES
CCCCOC(=O)COC1=C(C=C(C=C1)Cl)Cl.CCCCOC(=O)COC1=CC(=C(C=C1Cl)Cl)Cl
MeSH Unique ID
D000075182
Source
PubChem CID 38264

MeSH Record

Classification

Broader headings

Related Concepts

Knowledge Graph

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Drug Class

Pharmacological Action

MeSH Record

Synonyms

3 entry terms
  • (2,4-dichlorophenoxy)acetic acid, butyl ester, mixt. with butyl (2,4,5-trichlorophenoxy)acetate
  • 2,4-D - 2,4,5-T mixture
  • Orange, Agent

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

History Note

2018 (1980)

MeSH Hierarchy

Tree Numbers

  1. D02w.241w.081.018w.386.682.224w.500w
  2. D02w.241w.081.018w.386.682.800w.500w
  3. D02w.241w.511w.316.682.149w.500w
  4. D02w.241w.511w.316.682.800w.500w
  5. D02w.309w.500.450w.500w
  6. D03w.633.300.786w.500w

AMA Style

References

  1. National Library of Medicine. Agent Orange. Medical Subject Headings (MeSH). 2026. Unique ID D000075182. http://id.nlm.nih.gov/mesh/2026/D000075182
  2. Agent Orange. In: Wikipedia. https://en.wikipedia.org/wiki/Agent_Orange
  3. Agent Orange. In: Wikidata. https://www.wikidata.org/wiki/Q215946
  4. Agent Orange. In: PubChem Compound. CID 38264. https://pubchem.ncbi.nlm.nih.gov/compound/38264