Physicochemical properties of organophosphorus pesticides

Organophosphorus pesticides are mostly oily or crystalline, and industrial products are pale yellow to brown. Except for trichlorfon and dichlorvos, most of them have a garlic odor. Generally insoluble in water, soluble in organic solvents such as benzene, acetone, ether, chloroform and oils, stable to light, heat and oxygen, easily decomposed and destroyed in the presence of alkalis, except for trichlorfon, which is white Crystallized, soluble in water, it can be transformed into dichlorvos with greater toxicity in case of alkali. Organophosphorus pesticide formulations on the market mainly include four formulations: emulsifier, wettable powder, granule and powder. In recent years, mixtures and compounding agents have gradually increased.