Metoxuron - Process, Technology, Applications, Patent, Consultants, Company Profiles, Reports, MSDS, Plant, Suppliers

Metoxuron is a contact herbicide formerly used in Australia to control broadleaf weeds in carrots, parsnips, wheat and barley.
Metoxuron (MX) is a selective herbicide absorbed by the leaves and roots and acting as photosynthetic electron transport inhibitor at the photosystem II receptor site.
A simple and rapid titrimetric method for the determination of metoxuron, based on its oxidation with cerium(IV) in sulfuric acid medium, is described. The method permits detection of the end-point visually, potentiometrically or spectrophotometrically.
The phenylurea herbicide metoxuron and its main metabolite, 3-chloro-4-methoxyaniline, can be determined rapidly in aqueous samples via extraction, derivatization with heptafluorobutyric anhydride (HFBA), washing with an aqueous bufferof pH 8, and analysis by capillary GC with electron capture detection.
UV irradiation of metoxuron in aerated aqueous solution at 254?nm or between 300 and 450?nm led initially to an almost specific photohydrolysis of the C–Cl bond, resulting in the formation of 3-(3-hydroxy-4-methoxyphenyl)-1,1-dimethylurea (MX3) and hydrogen chloride.
Among the various physico-chemical processes which effect the fate of soil applied herbicides, adsorption-desorption is an important process which controls all other processes viz., the movement, persistence and degradation. Adsorption-desorption studies were conducted by equilibrating 5g of 2mm sieved soil sample with given initial concentrations of metoxuron.
An on-line automated method for photodegradation studies of isoproturon, diuron, atrazine, fenitrothion, and metoxuron by means of liquid chromatography/ mass spectrometry (LC/MS) with particle beam (PB) interface is described.

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