Products

 

OXYFLUORFEN

 

Herbicide: diphenyl ether



NOMENCLATURE
Common name oxyfluorfen (BSI, E-ISO, ANSI, WSSA); oxyfluorfène ((m) F-ISO)
IUPAC name 2-chloro-a,a,a-trifluoro-p-tolyl 3-ethoxy-4-nitrophenyl ether 
Chemical Abstracts name 2-chloro-1-(3-ethoxy-4-nitrophenoxy)-4-(trifluoromethyl)benzene 
CAS RN [42874-03-3]  EEC no. 255-983-0  Development codes RH-2915 (Rohm & Haas)

PHYSICAL CHEMISTRY
Mol. wt. 361.7  M.f. C15H11ClF3NO4  Form Orange, crystalline solid.  M.p. 85-90 ºC; (tech., 65-84 ºC)  B.p. 358.2 ºC (decomp.)  V.p. (pure a.i.) 0.0267 mPa (25 ºC)  KOW logP = 4.47  S.g./density 1.35 (73 ºC)  Solubility In water 0.116 mg/l (25 ºC). Readily soluble in most organic solvents, e.g. acetone 72.5, cyclohexanone, isophorone 61.5, dimethylformamide >50, chloroform 50-55, mesityl oxide 40-50 (all in g/100 g, 25 ºC).  Stability No significant hydrolysis in 28 d at pH 5-9 (25 ºC). Decomposed rapidly by u.v. irradiation; DT50 3 d (room temperature). Stable up to 50 ºC.
APPLICATIONS
Biochemistry Protoporphyrinogen oxidase inhibitor.  Mode of action Selective contact herbicide, absorbed more readily by the foliage (and especially the shoots) than by the roots, with very little translocation.  Uses Control of annual broad-leaved weeds and grasses in a variety of tropical and subtropical crops, by pre- or post-emergence application at rates in the range 0.25-2.0 kg a.i./ha. Particular crops include tree fruit (including citrus), vines, nuts, cereals, maize, soya beans, peanuts, rice, cotton, bananas, peppermint, onions, garlic, ornamental trees and shrubs, and conifer seedbeds.  Phytotoxicity Soya beans and cotton may be injured by contact with oxyfluorfen.  Formulation types EC; GR.