Isoxafenacil

Isoxafenacil

Skeletal formula of isoxafenacil
Names
Preferred IUPAC name ethyl 3-{2-chloro-4-fluoro-5-[3-methyl-2,6-dioxo-4-(trifluoromethyl)pyrimidin-1-yl]phenyl}-5-methyl-4H-1,2-oxazole-5-carboxylate
Identifiers
CAS Number	1949837-17-5
3D model (JSmol)	Interactive image
PubChem CID	146323887
UNII	XDW5XZ5MRP
InChI InChI=1S/C19H16ClF4N3O5/c1-4-31-16(29)18(2)8-12(25-32-18)9-5-13(11(21)6-10(9)20)27-15(28)7-14(19(22,23)24)26(3)17(27)30/h5-7H,4,8H2,1-3H3 Key: ZFQQLFKHTMIGJX-UHFFFAOYSA-N
SMILES CCOC(=O)C1(C)CC(c2cc(-n3c(=O)cc(C(F)(F)F)n(C)c3=O)c(F)cc2Cl)=NO1
Properties
Chemical formula	C19H16ClF4N3O5
Molar mass	477.80 g·mol−1
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Isoxafenacil is an herbicide belonging to the N-phenylimide class of chemicals. ^[1] Its mechanism of action is the inhibition of protoporphyrinogen oxidase, ^[2] corresponding to the HRAC group Group G (Australia), Group E (global) or Group 14 (numeric).

The herbicide was first approved to use the ISO common name isofenaxil in May 2025, and is included in the March 2026 update of the ISO 1750:2023 dataset. ^[3] It is produced by Nantong Jiangshan Agrochemical and Chemicals Co. Ltd. under the Chinese common name 苯嘧草唑; běnmìcǎozuò. ^[4]

References

1. "Isoxafenacil". BCPC Pesticide Compendium. British Crop Protection Council. Retrieved January 22, 2026.
2. "Nantong Jiangshan receives provisional ISO approval for isoxafenacil- China monthly market report". CNChemicals. Retrieved August 21, 2025.^{[ permanent dead link ]}
3. "Isoxafenacil". ISO Committee. May 8, 2025. Retrieved January 23, 2026.
4. "Isoxafenacil - A new common name for an N-phenylimide herbicide from Nantong Jiangshan Agrochemical and Chemicals Co. LTD. Provisionally approved by ISO". AgroPages. November 12, 2024. Retrieved January 23, 2026.