Insecticide and rodenticide which is a respiratory, metabolic, and nerve poison. Evolves a non-flammable mixture of phosphine (the toxicant), ammonia and carbon dioxide. Fumigation control of insect and rodent pests in stored grains (wheat, rye, barley, rice, sorghum, maize, etc.), seed grains, grain products (flour, noodles, semolina, etc.), pulses (peas, beans, lentils, etc.), tobacco, tapioca (roots and flour), oil seeds, expeller cake, nuts, nut kernels, dried fruit, coffee beans, cocoa beans, tea, etc.; and in empty warehouses, silos, packing materials, transport containers, etc.