10269. Cyhalofop-butyl

Nomenclature

CAS number: 122008-85-9
(2R)-2-[4-(4-Cyano-2-fluorophenoxy)phenoxy]propanoic acid butyl ester; XDE-537; Clincher (Dow AgroSci.).
C20H20FNO4; mol wt 357.38.
C 67.22%, H 5.64%, F 5.32%, N 3.92%, O 17.91%.

Description and references

Post-emergent herbicide for use in rice crops. Prepn: G. R. Pews et al., EP 302203; eidem, US 4894085 (1989, 1990 both to Dow). Multi-residue analysis method in water samples: M. Sakamoto, T. Tsutsumi, J. Chromatogr. A 1028, 63 (2004) DOI PubMed. Ecotoxicology and aquatic risk assessment: R. Jackson, M. Douglas, in Human and Environmental Exposure to Xenobiotics, A. A. M. Del Re et al., Eds. (La Goliardica Pavese, Pavia, 1999) pp 345-354. Field trial for barnyardgrass control in rice: D. A. Ntanos et al., Weed Technol. 14, 383 (2000) DOI.

Chemical structure

Properties

Off-white to buff, waxy solid with faint almond odor. mp 45.5-49.5°. d20 1.172. Log P (octanol/water) at 25°: 3.3158. Vapor pressure: 5.3 × 108 kPa. Soly in water (20°): 0.44 mg/l (pH 7). LC50 (96 hr) in rainbow trout, bluefill sunfish (mg/l): 1.65, 0.64 (Jackson, Douglas).

Use

Herbicide.