Flazasulfuron is an organic compound that is used as a herbicide. It is classified as a sulfonylurea, because it contains that functional group. The mode of action of flazasulfuron is the inhibition of the enzyme acetolactate synthase (ALS), which results in the inhibition of amino acid synthesis, cell division and ultimately plant growth. Flazasulfuron can be used on both pre-emergent weeds and post-emergent weeds. Growth ceases within hours of the application of the compound. Symptoms include leaf discolouration, desiccation, necrosis and ultimately plant death within 20 – 25 days of application. It is a white, water-soluble solid.^[1]

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Flazasulfuron

Names
Preferred IUPAC name N-[(4,6-Dimethoxypyrimidin-2-yl)carbamoyl]-3-(trifluoromethyl)pyridine-2-sulfonamide
Other names Katana, Shibagen
Identifiers
CAS Number	104040-78-0 Y
3D model (JSmol)	Interactive image
ChemSpider	84440
ECHA InfoCard	100.123.655
PubChem CID	93539
UNII	3SB13WWV30 Y
CompTox Dashboard (EPA)	DTXSID3034610
InChI InChI=1S/C13H12F3N5O5S/c1-25-8-6-9(26-2)19-11(18-8)20-12(22)21-27(23,24)10-7(13(14,15)16)4-3-5-17-10/h3-6H,1-2H3,(H2,18,19,20,21,22) Key: HWATZEJQIXKWQS-UHFFFAOYSA-N InChI=1/C13H12F3N5O5S/c1-25-8-6-9(26-2)19-11(18-8)20-12(22)21-27(23,24)10-7(13(14,15)16)4-3-5-17-10/h3-6H,1-2H3,(H2,18,19,20,21,22) Key: HWATZEJQIXKWQS-UHFFFAOYAQ
SMILES COc1cc(nc(n1)NC(=O)NS(=O)(=O)c2c(cccn2)C(F)(F)F)OC
Properties
Chemical formula	C13H12F3N5O5S
Molar mass	407.3
Appearance	white solid
Melting point	166-170
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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