除草剂百草枯的20%SL

Herbicide:Paraquat 20% SL PARAQUAT 20% SLis a quaternary nitrogen herbicide widely used for broadleaf weed control. It is a quick-acting, nonselective compound, that destroys green plant tissue on contact and by translocation within the plant. It has been employed for killing marijuana in the U.S. and in Mexico. It is also used as a crop desiccant and defoliant, and as an aquatic herbicide. Composition Not normally isolated from the tech. products, which are >95% pure. Mol. wt. 257.2 M.f. C12H14Cl2N2 Form Colourless, hygroscopic crystals. M.p. Decomposes at c. 340 V.p. <1 ?10-2 mPa (25 ) KOW logP = -4.5 (20 ) Henry <4 ?10-9 Pa m3 mol-1 (calc.) S.g./density 1.24-1.26 (20 ) Solubility In water c. 620 g/l (20 ). Practically insoluble in most organic solvents. Stability Stable in neutral and acidic media, but readily hydrolysed in alkaline media. Photochemically decomposed by u.v. irradiation in aqueous solution. Uses Broad-spectrum control of broad-leaved weeds and grasses in fruit orchards (including citrus), plantation crops (bananas, coffee, cocoa palms, coconut palms, oil palms, rubber, etc.), vines, olives, tea, alfalfa, onions, leeks, sugar beet, asparagus, ornamental trees and shrubs, in forestry, etc. Also used for general weed control on non-crop land; as a defoliant for cotton and hops; for destruction of potato haulms; as a desiccant for pineapples, sugar cane, soya beans, and sunflowers; for strawberry runner control; in pasture renovation; and for control of aquatic weeds. For control of annual weeds, applied at 0.4-1.0 kg/ha.