NOMENCLATURE
fenoxaprop-P-ethyl
Chemical Abstracts name ethyl (R)-2-[4-[(6-chloro-2-benzoxazolyl)oxy]phenoxy]propanoate
CAS RN [71283-80-2] Development codes Hoe 046360 (Hoechst); AE F046360 (AgrEvo)
fenoxaprop-P
Common name fenoxaprop-P (BSI, draft E-ISO, (m) draft F-ISO)
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] Development codes Hoe 088406 (Hoechst); AE F088406 (AgrEvo)
PHYSICAL CHEMISTRY
fenoxaprop-P-ethyl
Mol. wt. 361.8 M.f. C18H16ClNO5 Form White, odourless solid. M.p. 89-91 ºC V.p. 5.3 ´ 10-4 mPa (20 ºC) KOW logP = 4.58 Henry 2.74 ´ 10-4 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).
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.
