Various portable and fixed dry powder fire extinguishers may be charged with this extinguishing agent. The Ammonium Phosphate Dry Chemical agent is the most effective extinguishing agent for extinguishing fires involving flammable solids, flammable fluids, combustible gases and electric equipment. This agent can be used in combination with foam extinguishing agents. It exhibits superior effectiveness in extinguishing large-area fires and is widely used in fire protection and fire extinguishing in oilfields, oil depots, petroleum refineries, large chemical plants, chemical storerooms, ships, airports, mines, factories, restaurants, and hotels, as well as in forested areas.