Imazapyr

Imazapyr

Names
IUPAC name (RS)-2-(4-Methyl-5-oxo-4-propan-2-yl-1H-imidazol-2-yl)pyridine-3-carboxylic acid
Identifiers
CAS Number	81334-34-1  Y
3D model (JSmol)	Interactive image
ChEBI	CHEBI:82021  N
ChemSpider	49445  N
ECHA InfoCard	100.118.758
KEGG	C18864  Y
PubChem CID	54738
UNII	787MX0M5A6  Y
CompTox Dashboard (EPA)	DTXSID8034665
InChI InChI=1S/C13H15N3O3/c1-7(2)13(3)12(19)15-10(16-13)9-8(11(17)18)5-4-6-14-9/h4-7H,1-3H3,(H,17,18)(H,15,16,19) N Key: CLQMBPJKHLGMQK-UHFFFAOYSA-N N InChI=1/C13H15N3O3/c1-7(2)13(3)12(19)15-10(16-13)9-8(11(17)18)5-4-6-14-9/h4-7H,1-3H3,(H,17,18)(H,15,16,19) Key: CLQMBPJKHLGMQK-UHFFFAOYAH
SMILES OC(C1=C(C(N2)=NC(C)(C(C)C)C2=O)N=CC=C1)=O
Properties
Chemical formula	C13H15N3O3
Molar mass	261.281 g·mol−1
Density	1,34
Melting point	169-171
Solubility in water	13.47 g/L
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). N  verify  (what is  YN ?) Infobox references

Imazapyr is a non-selective herbicide used for the control of a broad range of weeds including terrestrial annual and perennial grasses and broadleaved herbs, woody species, and riparian and emergent aquatic species. ^[1] It is used to control annual and perennial grass and broadleaved weeds, brush, vines and many deciduous trees. Imazapyr is absorbed by the leaves and roots, and moves rapidly through the plant. It accumulates in the meristem region (active growth region) of the plant. In plants, imazapyr disrupts protein synthesis and interferes with cell growth and DNA synthesis. ^[2]

Imazapyr is an ingredient of the commercial product Ortho GroundClear. A related herbicide, imazapic is an ingredient in Roundup Extended Control. Both chemicals are non-selective, long-lasting, and effective in weed control. Water-soluble, depending on soil type and moisture, they can move into parts of the landscape where they were not sprayed. Some desirable landscape plants are especially sensitive to them and can be damaged.^{[ citation needed ]}

Imazapyr's HRAC classification is Group B (global, Aus), Group 2 (numeric), as it inhibits acetohydroxyacid synthase. ^[3]

References

1. Reregistration Eligibility Decision for Imazapyr, U.S. Environmental Protection Agency
2. "Imazapyr Product Data Sheet" (PDF). TOKU-E. October 10, 2011. Archived from the original (PDF) on April 23, 2016.
3. "Classification of Herbicides According to Site of Action" . Retrieved 19 July 2025.