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Guthion is the common name of an organophosphorus insecticide. It is a formulation that includes the active ingredient of azinphos-methyl. The molecular formula for azinphos-methyl is C10H12N3O3PS2. Pure guthion is a colourless to white odourless crystalline solid. Technical-grade guthion is a cream to yellow-brown granular solid. It does not occur naturally in the environment. [1,2]
