3984. Fenoxaprop-ethyl

Nomenclature

CAS number: 66441-23-4
2-[4-[(6-Chloro-2-benzoxazolyl)oxy]phenoxy]propanoic acid ethyl ester; HOE-33171.
C18H16ClNO5; mol wt 361.78.
C 59.76%, H 4.46%, Cl 9.80%, N 3.87%, O 22.11%.

Description and references

Selective postemergent herbicide to control grassy weeds in broadleaved crops and established turfgrass. Prepn: BE 858618; R. Handte et al., US 4130413 (both 1978 to Hoechst). Metabolism in soybeans: O. Wink et al., J. Agric. Food Chem. 32, 187 (1984). Persistence in soil: A. E. Smith, ibid. 33, 483 (1985). Field trials in agricultural crops: G. W. Kerse et al., Proc. 36th N. Z. Weed Pest Control Conf. 265 (1983); in turfgrass: P. H. Dernoeden, J. D. Fry, Proc. Annu. Meet. Northeast. Weed Sci. Soc. 39, 282 (1985). Brief description: J. Bieringer et al., Proc. Br. Crop Prot. Conf. - Weeds 1982, 11-17.

Chemical structure

Properties

mp 84-85°. bp 200° at 100 Pa. Vapor pressure at 20°: 0.19×10-5 Pa. Soly at 20° (%): >0.5 in hexane; >1 in cyclohexane, ethanol, 1-octanol; >20 in ethyl acetate; >30 in toluene; >50 in acetone. Soly in water at 25°: 0.9 mg/l. LD50 in male, female rats (mg/kg): 2357, 2500 orally; 739, 864 i.p. (Bieringer).

Derivative

(R)-Form.

Nomenclature

CAS number: 71283-80-2
Fenoxaprop-P-ethyl; HOE-46360; Acclaim (Bayer CropSci.); Furore Super (Bayer CropSci.); Puma (Bayer CropSci.); Ricestar (Bayer CropSci.); Whip (Bayer CropSci.).

Description and references

Comprehensive description: H. P. Huff et al., Brighton Crop Prot. Conf. - Weeds 1989, 717-722.

Properties

LD50 in male, female rats (mg/kg): 3040, 2090 orally; >2000, >2000 dermally (Huff).

Use

Postemergent herbicide.