Quinclorac

Quinclorac is an organic compound with the formula C₉NH₄Cl₂CO₂H. A colorless solid, it is soluble in hydrocarbons and alcohols. The compound is the carboxylic acid of 3,7-dichloroquinoline.

Quinclorac

Names
Preferred IUPAC name 3,7-Dichloroquinoline-8-carboxylic acid
Other names Quinchlorac
Identifiers
CAS Number	84087-01-4 Y
3D model (JSmol)	Interactive image
ChEBI	CHEBI:81974
ChemSpider	82837
ECHA InfoCard	100.100.457
KEGG	C18806
PubChem CID	91739
UNII	3J06V625EE Y
CompTox Dashboard (EPA)	DTXSID6032641
InChI InChI=1S/C10H5Cl2NO2/c11-6-3-5-1-2-7(12)8(10(14)15)9(5)13-4-6/h1-4H,(H,14,15) Key: FFSSWMQPCJRCRV-UHFFFAOYSA-N InChI=1/C10H5Cl2NO2/c11-6-3-5-1-2-7(12)8(10(14)15)9(5)13-4-6/h1-4H,(H,14,15) Key: FFSSWMQPCJRCRV-UHFFFAOYAE
SMILES O=C(O)c1c(Cl)ccc2cc(Cl)cnc12
Properties
Chemical formula	C10H5Cl2NO2
Molar mass	242.06 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

Applications

Quinclorac is an herbicide used primarily to control crabgrass.^[1] It is found in some household herbicides for lawn use. Most^{[citation needed]} lawn maintenance companies use the product for the control of annual grass weeds like crabgrass.

Quinclorac is a synthetic auxin.^[2][3] Heap considers it to also have a cellulose herbicide action,^[4] although some studies show quinclorac to have no cellulose action.^[5]

Regulation and registration

Quinclorac is not approved to use in the European Union due to toxicity concerns.^[6][7]

Resistance

Resistance to quinclorac is of concern in soybean cultivation. In rice, Graminaceous resistance is produced by the cytochrome enzyme CYP81A6.^[8]

Further reading

• Alonso-Simón, Ana; García-Angulo, Penélope; Mélida, Hugo; Encina, Antonio; Álvarez, Jesús M.; Acebes, José L. (2011). "The use of FTIR spectroscopy to monitor modifications in plant cell wall architecture caused by cellulose biosynthesis inhibitors". Mini Review. Plant Signaling & Behavior. 6 (8): 1104–1110. Bibcode:2011PlSiB...6.1104A. doi:10.4161/psb.6.8.15793. PMC 3260703. PMID 21791979.