122008-85-9

Basic information

• Product Name: Cyhalofop-butyl
• Synonyms: CYHALOFOP-BUTYL;(R)-butyl 2-(4-(4-cyano-2-fluorophenoxy)phenoxy)propanoate;cyhalofop butyl ester;XDE 537;Propanoic acid, 2-4-(4-cyano-2-fluorophenoxy)phenoxy-, butyl ester, (2R)-;cyhalofop-butyl (pa iso, ansi);(2R)-2-(4-(4-Cyano-2-fluorophenoxy)phenoxy)propanoic acid butyl ester;Butyl-(R)-2-[4-(4-cyano-2-fluorophenoxy) phenoxy]propionate
• CAS NO: 122008-85-9
• Molecular Formula: C20H20FNO4
• Molecular Weight: 357.38
• Mol File: 122008-85-9.mol
• Article Data: 0

Chemical Properties

• Melting Point: 47.0 to 51.0 °C
• Boiling Point: 449.1 °C at 760 mmHg
• Flash Point: 122℃
• Appearance: /
• Density: 1.21 g/cm³
• Vapor Pressure: 2.94E-08mmHg at 25°C
• Refractive Index: 1.55
• Storage Temp.: 0-6°C
• Solubility: soluble in Methanol
• CAS DataBase Reference: Cyhalofop-butyl(CAS DataBase Reference)
• NIST Chemistry Reference: Cyhalofop-butyl(122008-85-9)
• EPA Substance Registry System: Cyhalofop-butyl(122008-85-9)

Safety Data

• Hazard Codes: Xn,N
• Statements: 22-50
• Safety Statements: 61
• RIDADR: UN 3077 9 / PGIII
• WGK Germany: 3
• HazardClass: 9
• PackingGroup: III
• Hazardous Substances Data: 122008-85-9(Hazardous Substances Data)

Usage

Precautions for Use

Cyhalofop-butyl does not present any useful pre-emergence activity. It can be applied from germination to the four-leafstage of barnyard grass with granular formulations, and from germination to the six-leaf stage with liquid formulations. lt israinfast within 2-3 hours and has no residual activity. The US product label states that 2.3 L/ha of crop oil concentrateshould be added to the tank for all treatments. The product poses low risk to nearby crops such as cotton, soybeans andvegetables but Dow advises that drift to more sensitive crops such as maize, nectarines, peaches, sugar cane and sorghum should be avoided.

Description

Cyhalofop-butyl is a post-emergence, aryloxyphenoxypropionate herbicide, which is used in controlling weeds in rice plantations. Its mode of action involves the inhibition of acetyl-coenzyme A carboxylase (ACCase) biosynthesis.Cyhalofop-butyl has a low aqueous solubility and is non-volatile. It is non expected to be eprsistent in soil systems but may be persistent in some water systems depending on local conditions. Cyhalofop-butyl is moderately toxic to fish and aquatic plants but has a low toxicity ti aquatic invertebrates, birds and honeybees. It has a low mammalian oral toxicity.

Uses

Cyhalofop-butyl may be used as a reference standard in the determination of cyhalofop-butyl in rice samples using liquid chromatography coupled with diode array detector (LC-DAD).

Trade name

Clincher (Technical)Clincher (CA)Clincher (SF)U.S. Producer: Dow AgroSciences LLC

Mode of action

Cyhalofop-butyl is an inhibitor of acetyl coenzyme -A carboxylase, a pivotal enzyme in plant fatty acid biosynthesis.

InChI:InChI=1/C20H20FNO4/c1-3-4-11-24-20(23)14(2)25-16-6-8-17(9-7-16)26-19-10-5-15(13-22)12-18(19)21/h5-10,12,14H,3-4,11H2,1-2H3/t14-/m1/s1