Products

 

LINURON

 

Herbicide: urea

NOMENCLATURE
Common name linuron (BSI, E-ISO, (m) F-ISO, ANSI, WSSA, JMAF)
IUPAC name 3-(3,4-dichlorophenyl)-1-methoxy-1-methylurea 
Chemical Abstracts name N'-(3,4-dichlorophenyl)-N-methoxy-N-methylurea 
CAS RN [330-55-2]  EEC no. 206-356-5  Development codes DPX-Z326 (Du Pont); AE F002810 (AgrEvo); Hoe 02 810 (Hoechst) 

PHYSICAL CHEMISTRY
Composition Tech. is ³94% pure.  Mol. wt. 249.1  M.f. C9H10Cl2N2O2  Form Colourless crystals.  M.p. 93-95 ºC  V.p. 0.051 mPa (20 ºC); 7.1 mPa (50 ºC) (EC method)  KOW logP = 3.00  Henry 2.0 ´ 10-4 Pa m3 mol-1 (20 °C)  S.g./density 1.49 (20 ºC)  Solubility In water 63.8 mg/l (20 ºC, pH 7). In acetone 500, benzene, ethanol 150, xylene 130 (all in g/kg, 25 ºC). Readily soluble in dimethylformamide, chloroform, and diethyl ether. Moderately soluble in aromatic hydrocarbons. Sparingly soluble in aliphatic hydrocarbons.  Stability Stable at m.p. and in aqueous solution at pH 5, 7 & 9; DT50 945 d at all three pH values. 

APPLICATIONS
Biochemistry Photosynthetic electron transport inhibitor at the photosystem II receptor site.  Mode of action Selective systemic herbicide, absorbed principally by the roots but also by the foliage, with translocation primarily acropetally in the xylem.  Uses Pre- and post-emergence control of annual grass and broad-leaved weeds, and some seedling perennial weeds, in asparagus, artichokes, carrots, parsley, fennel, parsnips, herbs and spices, celery, celeriac, onions, leeks, garlic, potatoes, peas, field beans, soya beans, cereals,maize, sorghum, cotton, flax, sunflowers, sugar cane, ornamentals, established vines, bananas, cassava, coffee, tea, rice, peanuts, ornamental trees and shrubs, and other crops.  Formulation types EC; SC; WP.