cyhalofop butyl ester

Description

cyhalofop butyl ester · CAS 122008-85-9 · C20H20FNO4. UNII 18HGV9OC6G. Boiling Point: >270 °C (decomposes); Melting Point: 49.5 °C; Vapor Pressure: 0.0000004 [mmHg].

Identification

CAS Registry Number	122008-85-9
PubChem CID	180089
Molecular formula	C20H20FNO4
IUPAC name	butyl (2R)-2-[4-(4-cyano-2-fluorophenoxy)phenoxy]propanoate
UNII (FDA)	18HGV9OC6G

Computed Descriptors

Molecular Weight	357.4
XLogP3	4.8
Hydrogen Bond Donor Count	0
Hydrogen Bond Acceptor Count	6
Rotatable Bond Count	9
Exact Mass	357.13763628
Monoisotopic Mass	357.13763628
Topological Polar Surface Area	68.6
Heavy Atom Count	26
Formal Charge	0

Physical & Chemical Properties

Boiling Point	>270 °C (decomposes)
Melting Point	49.5 °C
Vapor Pressure	0.0000004 [mmHg]
Vapor Pressure	5.3X10-2 mPa /4.0X10-7 mm Hg/ at 25 °C
LogP	log Kow = 3.31 at 25 °C
pH	pH = 6.73 at 23 °C (end-use)

Physical description & handling notes

• Off-white to beige waxy solid (technical product); Clear amber liquid (end-use product); [HSDB]
• White crystalline solid
• Waxy off-white to buff colored solid (technical); clear amber liquid (end-use)
• Faint almond odor (technical); mild aromatic odor (end-use)
• 122 °C (closed cup) /from table/
• 255 °C (open cup) /from table/

GHS Hazard Classification

Reported hazard statements	H302 (27.7%), H400 (100%), H410 (73%), H315, H373

Documented Uses

• Used as post-emergence herbicide for control of weeds in rice; [HSDB]
• Herbicide; controls postemergence grass weeds in rice.
• On the base of the studies conducted, the mean predicted human dermal absorption values for the concentrate and spray are 1.3% and 11%, while the maximum predicted dermal absorption values for the concentrate and spray are 1.5% and 14%, respectively.
• Rats, dogs, ruminants and poultry readily metabolise cyhalofop-butyl by hydrolysis to the acid. Depending on the animal, the acid may also break down to other metabolites. The acid and any additional degradates are then rapidly excreted. Residue levels of cyhalofop-butyl and its metabolites are low in milk, eggs and tissues.
• Organic nitriles are converted into cyanide ions through the action of cytochrome P450 enzymes in the liver. Cyanide is rapidly absorbed and distributed throughout the body. Cyanide is mainly metabolized into thiocyanate by either rhodanese or 3-mercaptopyruvate sulfur transferase. Cyanide metabolites are excreted in the urine. (L96)

Synonyms

Cyhalofop-butyl; 122008-85-9; Clincher; DTXSID1034503; XDE 537; 18HGV9OC6G; XDE-537; butyl (2R)-2-[4-(4-cyano-2-fluorophenoxy)phenoxy]propanoate; Propanoic acid, 2-(4-(4-cyano-2-fluorophenoxy)phenoxy)-, butyl ester, (2R)-; DTXCID9014503; (2R)-2-(4-(4-cyano-2-fluorophenoxy)-phenoxy)propanic acid butylester; Propanoic acid, 2-[4-(4-cyano-2-fluorophenoxy)phenoxy]-, butyl ester, (2R)-; Cyhalofop butyl ester; (2R)-2-(4-(4-Cyano-2-fluorophenoxy)phenoxy)propanoic acid butyl ester; (2R)-2-[4-(4-cyano-2-fluorophenoxy)phenoxy]propanoic acid butyl ester; butyl (2R)-2-(4-(4-cyano-2-fluorophenoxy)phenoxy)propanoate

Frequently Asked Questions

What are the CAS number and molecular formula of cyhalofop butyl ester?

CAS 122008-85-9; molecular formula C20H20FNO4; molecular weight — g/mol.

What other names is cyhalofop butyl ester known by?

Cyhalofop-butyl, 122008-85-9, Clincher, DTXSID1034503, XDE 537, 18HGV9OC6G.

Is cyhalofop butyl ester classified as hazardous?

Hazard statements reported: H302, H400, H410, H315, H373.

What are the key physical properties of cyhalofop butyl ester?

Boiling Point: >270 °C (decomposes); Melting Point: 49.5 °C; Vapor Pressure: 0.0000004 [mmHg]; Vapor Pressure: 5.3X10-2 mPa /4.0X10-7 mm Hg/ at 25 °C.

Facts on this page are taken from PubChem (US National Library of Medicine) and Wikidata. Grade-specific data — assay, moisture, particle size, packaging, shelf life — is issued per batch on the COA and is not published here.