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Product Description

Fenoxaprop-p-ethyl chemical abstracts name: ethyl (r)-2-[4-[(6-chloro-2-benzoxazolyl)oxy]phenoxy]propanoate cas rn: [71283-80-2] fenoxaprop-p common name: fenoxaprop-p iupac name: (r)-2-[4-(6-chloro-1,3-benzoxazol-2-yloxy)phenoxy]propionic acid; (r)-2-[4-(6-chlorobenzoxazol-2-yloxy)phenoxy]propionic acid chemical abstracts name: (r)-2-[4-[(6-chloro-2-benzoxazolyl)oxy]phenoxy]propanoic acid cas rn: [113158-40-0] physical chemistry fenoxaprop-p-ethyl mol. wt.: 361.8; m.f.: c18h16clno5 form: white, odourless solid. m.p.: 89-91 ºc. v.p.: 5.3x10-4 mpa (20 ºc). kow: logp = 4.58. henry: 2.74x10-4 pa m3 mol-1 (calc.) s.g./density: 1.3 (20 °c). solubility: in water 0.7 mg/l (ph 5.8, 20 ºc). in acetone 200, toluene 200, ethyl acetate >200, ethanol c. 24 (all in g/l, 20 ºc). stability: fenoxaprop-p-ethyl is stable for 90 d at 50 ºc. not sensitive to light. decomposed by acids and alkalis, dt50 >1000 d (ph 5), 100 d (ph 7), 2.4 d (ph 9) (20 ºc). fenoxaprop-p mol. wt.: 333.7; m.f.: c16h12clno5 form: light beige, weakly pungent, fine powder. m.p.: 155-161 °c; v.p.: 1.8x10-1 mpa (20 °c). kow: logp = 1.83-0.24 (ph 5 - ph 9). s.g./density: c. 1.5 (20 °c) solubility: in water 0.27 (ph 5.1), 61 (ph 7.0) (both in g/l, 20 °c). in acetone 80, toluene 0.5, ethyl acetate 36, methanol 34 (all in g/l, 20 °c). applications fenoxaprop-p-ethyl biochemistry: fatty acid synthesis inhibition in grasses, by inhibition of acetyl coa carboxylase (accase). mode of action: fenoxaprop-p-ethyl is a selective herbicide with contact and systemic action, absorbed principally by the leaves, with translocation both acropetally and basipetally to the roots or rhizomes. uses: post-emergence control of annual and perennial grass weeds in potatoes, beans, soya beans, beets, vegetables, peanuts, flax, oilseed rape, and cotton; and (when applied with the herbicide safener mefenpyr-diethyl) annual and perennial grass weeds and wild oats in wheat, rye, triticale and, depending on ratio, in some varieties of barley. phytotoxicity: non-phytotoxic to broad-leaved crops. formulation types: ec; ew; se. mammalian toxicology fenoxaprop-p-ethyl oral: acute oral ld50 for rats 3150-4000, mice >5000 mg/kg. skin and eye: acute percutaneous ld50 for rats >2000 mg/kg. inhalation: lc50 (4 h) for rats >1.224 mg/l air. noel: (90 d) for rats 0.75 mg/kg b.w. daily (10 ppm), mice 1.4 mg/kg b.w. daily (10 ppm), dogs 15.9 mg/kg b.w. daily (400 ppm). ecotoxicology fenoxaprop-p-ethyl birds: acute oral ld50 for bobwhite quail >2000 mg/kg. fish: lc50 (96 h) for bluegill sunfish 0.58, rainbow trout 0.46 mg/l. daphnia: lc50 (48 h) 0.56 (ph 8.0-8.4), 2.7 (ph 7.7-7.8) (both mg/l). algae: lc50 (72 h) for scenedesmus subspicatus 0.51 mg/l. bees: lc50 (contact) >300 ug/bee; (feed) >1000 ug/bee. worms: lc50 (14 d) for eisenia foetida >1000 mg/kg soil. environmental fate plants: in plants, fenoxaprop-ethyl is metabolised via fenoxaprop to 6-chloro-2,3-dihydrobenzoxazol-2-one. soil/environment: in soil, fenoxaprop-ethyl is rapidly hydrolysed