Fenoxaprop-ethyl

Title: Fenoxaprop-ethyl
CAS Registry Number: 66441-23-4
CAS Name: 2-[4-[(6-Chloro-2-benzoxazolyl)oxy]phenoxy]propanoic acid ethyl ester
Manufacturers' Codes: HOE-33171
Molecular Formula: C18H16ClNO5
Molecular Weight: 361.78
Percent Composition: C 59.76%, H 4.46%, Cl 9.80%, N 3.87%, O 22.11%
Literature 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.
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).
Melting point: mp 84-85°
Boiling point: bp 200° at 100 Pa
Toxicity data: LD50 in male, female rats (mg/kg): 2357, 2500 orally; 739, 864 i.p. (Bieringer)
Derivative Type: (R)-Form
CAS Registry Number: 71283-80-2
Additional Names: Fenoxaprop-P-ethyl
Manufacturers' Codes: HOE-46360
Trademarks: Acclaim (Bayer CropSci.); Furore Super (Bayer CropSci.); Puma (Bayer CropSci.); Ricestar (Bayer CropSci.); Whip (Bayer CropSci.)
Literature 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).
Toxicity data: LD50 in male, female rats (mg/kg): 3040, 2090 orally; >2000, >2000 dermally (Huff)
Use: Postemergent herbicide.
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