Quizalofop-P-ethyl

Quizalofop-P-ethyl
Names
	IUPAC name Ethyl (R)-2-[4-(6-chloroquinoxalin-2-yloxy)phenoxy]propionate
	Other names Ethyl (2R)-2-(4-((6-chloro-2-quinoxalinyl)oxy)phenoxy)propanoate
Identifiers
CAS Number	100646-51-3;
3D model (JSmol)	Interactive image;
ChEBI	CHEBI:137938;
ChEMBL	ChEMBL3138620;
ChemSpider	1299878;
ECHA InfoCard	100.132.447
PubChem CID	1617113;
UNII	1U4923B12R;
CompTox Dashboard (EPA)	DTXSID0034857 ;
	InChI InChI=1S/C19H17ClN2O4/c1-3-24-19(23)12(2)25-14-5-7-15(8-6-14)26-18-11-21-17-10-13(20)4-9-16(17)22-18/h4-12H,3H2,1-2H3/t12-/m1/s1 Key: OSUHJPCHFDQAIT-GFCCVEGCSA-N;
	SMILES CCOC(=O)C(C)OC1=CC=C(C=C1)OC2=CN=C3C=C(C=CC3=N2)Cl;
Properties
Chemical formula	C19H17ClN2O4
Molar mass	372.81 g·mol−1
Appearance	White crystalline powder
Melting point	75 °C (167 °F; 348 K)
Boiling point	Degrades at 320 °C (607 °F)
Solubility in water	0.61 mg/L
Solubility in acetone	250 g/L
Hazards
	Occupational safety and health (OHS/OSH):
Main hazards	Moderate human toxicity, toxic to fish
	GHS labelling:
Pictograms
Hazard statements	H301
	Lethal dose or concentration (LD, LC):
LD50 (median dose)	1182 - 1670 mg/kg (rat, oral);
LC50 (median concentration)	5.8 mg/L (rat, inhalation, 4 hours); LC₅₀/96 h: 10.7 mg/L (rainbow trout);
Related compounds
Related compounds	Quizalofop, Kuicaoxi
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Quizalofop-P-ethyl (QPE) is a herbicidal chemical, the most common form of quizalofop. In practice the terms are sometimes interchanged, although there are also quizalofop-ethyl and quizalofop-P-tefuryl which are also variants of quizalofop.^[3] It is an aryloxyphenoxypropionate.

QPE is racemic, and it is the more active enantimer of quizalofop-ethyl.^[1]

Quizalofop-P-ethyl's HRAC classification is Group A (Australia and global), or Group 1 (numeric). Group A herbicides inhibit acetyl CoA carboxylase, (ACCase).^[4]

QPE is approved for use in Australia, all of the European Union, Morocco and China.^[1]

References

1 2 3 4 5 6 7 8 Hertfordshire, University of. "Quizalofop-P-ethyl (Ref: DPX 79376)". sitem.herts.ac.uk. Retrieved 14 April 2026.
1 2 3 4 5 "4Farmers Quizalofop SDS" (PDF). 4farmers.com.au. 4Farmers Australia. 15 July 2021.
↑ "PPDB A to Z Index". sitem.herts.ac.uk. Retrieved 14 April 2026.
↑ "4Farmers Quizalofop-P-Ethyl 100 Infosheet" (PDF). 4farmers.com.au. 4Farmers Australia. Retrieved 14 April 2026.

External Links

Quizalofop-P-ethyl in the Pesticide Properties DataBase (PPDB)

[database-1] 1 2 3 4 5 6 7 8 Hertfordshire, University of. "Quizalofop-P-ethyl (Ref: DPX 79376)". sitem.herts.ac.uk. Retrieved 14 April 2026.

[4f_sds-2] 1 2 3 4 5 "4Farmers Quizalofop SDS" (PDF). 4farmers.com.au. 4Farmers Australia. 15 July 2021.

[3] "PPDB A to Z Index". sitem.herts.ac.uk. Retrieved 14 April 2026.

[4f_infosheet-4] "4Farmers Quizalofop-P-Ethyl 100 Infosheet" (PDF). 4farmers.com.au. 4Farmers Australia. Retrieved 14 April 2026.

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