Epyrifenacil

Epyrifenacil is an herbicide from the pyrimidinedione class which acts as a protoporphyrinogen oxidase inhibitor. It is effective against grass weeds and some broadleaf weeds.^[1][2] It is hepatotoxic and carcinogenic in animal models but these effects are not considered likely to affect humans at relevant exposure levels.^[3][4] Concerns have been raised about the environmental breakdown of epyrifenacil to the "forever chemical" trifluoroacetic acid.^[5]

Quick facts Names, Identifiers ...

Epyrifenacil

Names
Preferred IUPAC name ethyl 2-[[3-[2-chloro-4-fluoro-5-[3-methyl-2,6-dioxo-4-(trifluoromethyl)pyrimidin-1-yl]phenoxy]-2-pyridinyl]oxy]acetate
Identifiers
CAS Number	353292-31-6
3D model (JSmol)	Interactive image
ChEBI	CHEBI:191218
EC Number	885-819-9
PubChem CID	12097345
UNII	RAE3HFQ5BK
CompTox Dashboard (EPA)	DTXSID501020547
InChI InChI=1S/C21H16ClF4N3O6/c1-3-33-18(31)10-34-19-14(5-4-6-27-19)35-15-8-13(12(23)7-11(15)22)29-17(30)9-16(21(24,25)26)28(2)20(29)32/h4-9H,3,10H2,1-2H3 Key: XPEVJXBWHXAUDR-UHFFFAOYSA-N
SMILES CCOC(=O)COC1=C(C=CC=N1)OC2=C(C=C(C(=C2)N3C(=O)C=C(N(C3=O)C)C(F)(F)F)F)Cl
Properties
Chemical formula	C21H16ClF4N3O6
Molar mass	517.82 g·mol−1
Hazards
GHS labelling:
Pictograms
Signal word	Warning
Hazard statements	H410
Precautionary statements	P273, P391, P501
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

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