Structure via PubChem · Public domain (PubChem)
picloram
Sign in to saveAlso known as 4-amino-3,5,6-trichloropicolinic acid, 4-amino-3,5,6-trichloro-2-picolinic acid, ATCP, tordon, 4-amino-3,5,6-trichloropyridine-2-carboxylic acid
Picloram is a systemic herbicide used for general woody plant control. It also controls a wide range of broad-leaved weeds, but most grasses are resistant. A chlorinated derivative of picolinic acid, picloram is in the pyridine family of herbicides.
Chemical data
- Formula
- C6H3Cl3N2O2
- Molecular weight
- 241.5 g/mol
- IUPAC name
- 4-amino-3,5,6-trichloropyridine-2-carboxylic acid
- SMILES
- C1(=C(C(=NC(=C1Cl)Cl)C(=O)O)Cl)N
- InChIKey
- NQQVFXUMIDALNH-UHFFFAOYSA-N
- XLogP
- 2.2
- Polar surface area
- 76.2 Ų
- H-bond donors
- 2
- H-bond acceptors
- 4
- Formal charge
- 0
via PubChem
Drug data · ChEMBL
- Molecule type
- Small molecule
via ChEMBL · EBI
Research
404 papers- Picloram.IARC monographs on the evaluation of carcinogenic risks to humans · 1991
- Carcinogenicity of picloram.Journal of toxicology and environmental health · 1981
- PMID 306293952018
- Residue of Picloram in New Agricultural Areas: Impacts, Detection, and Mitigation Measures.ACS omega · 2026
- Picloram drift in Peltophorum dubium, a species native to the Brazilian Cerrado.Ecotoxicology (London, England) · 2025
via PubMed
Wikidata facts
- Subclass of
- organochlorine compound
- Mass
- 239.926
- Has use
- herbicide
Show 9 more facts
- chemical formula
- C₆H₃Cl₃N₂O₂
- NIOSH Pocket Guide ID
- 0514
- decomposition point
- 424
- solubility
- 0.04
- vapor pressure
- 0.0000006
- time-weighted average exposure limit
- 15
- canonical SMILES
- C1(=C(C(=NC(=C1Cl)Cl)C(=O)O)Cl)N
- MCN code
- 2933.39.21
- Commons category
- Picloram
via Wikidata · CC0
~2 min read
Encyclopedic overview
3 sectionsContents
- Safety
- References
- External links
Picloram is a systemic herbicide used for general woody plant control. It also controls a wide range of broad-leaved weeds, but most grasses are resistant. A chlorinated derivative of picolinic acid, picloram is in the pyridine family of herbicides.
Picloram can be sprayed on foliage, injected into plants, applied to cut surfaces, or placed at the base of the plant where it will leach to the roots. Once absorbed by the foliage, stem, or roots, picloram is transported throughout the plant.
Excerpted from Wikipedia’s “picloram” article, available under the CC BY-SA 4.0 licence.