Imazapyr

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title: "Imazapyr" type: doc version: 1 created: 2026-02-28 author: "Wikipedia contributors" status: active scope: public tags: ["carboxylic-acids", "herbicides", "disubstituted-pyridines", "imidazolines", "isopropyl-compounds", "group-2-herbicides"] topic_path: "general/carboxylic-acids" source: "https://en.wikipedia.org/wiki/Imazapyr" license: "CC BY-SA 4.0" wikipedia_page_id: 0 wikipedia_revision_id: 0

| Verifiedfields = changed | Watchedfields = changed | verifiedrevid = 433109364 | ImageFile=Imazapyr.png | ImageSize=200px | IUPACName=(RS)-2-(4-Methyl-5-oxo-4-propan-2-yl-1H-imidazol-2-yl)pyridine-3-carboxylic acid | OtherNames= |Section1={{Chembox Identifiers | CASNo_Ref = | CASNo=81334-34-1 | UNII_Ref = | UNII = 787MX0M5A6 | PubChem=54738 | ChEBI_Ref = | ChEBI = 82021 | KEGG_Ref = | KEGG = C18864 | SMILES=OC(C1=C(C(N2)=NC(C)(C(C)C)C2=O)N=CC=C1)=O | ChemSpiderID_Ref = | ChemSpiderID = 49445 | 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) | InChIKey = CLQMBPJKHLGMQK-UHFFFAOYAH | StdInChI_Ref = | StdInChI = 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) | StdInChIKey_Ref = | StdInChIKey = CLQMBPJKHLGMQK-UHFFFAOYSA-N |Section2={{Chembox Properties | C=13 | H=15 | N=3 | O=3 | Appearance= | Density= 1,34 | MeltingPt= 169-171 | BoilingPt= | Solubility=13.47 g/L |Section3={{Chembox Hazards | MainHazards= | FlashPt= | AutoignitionPt =

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.

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.

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

References

References

  1. [https://envirocancer.cornell.edu/turf/pdf/Imazapyr_RED.pdf Reregistration Eligibility Decision for Imazapyr], [[U.S. Environmental Protection Agency]]
  2. (October 10, 2011). "Imazapyr Product Data Sheet".
  3. "Classification of Herbicides According to Site of Action".

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carboxylic-acidsherbicidesdisubstituted-pyridinesimidazolinesisopropyl-compoundsgroup-2-herbicides