monoammoniumfoszfát

Monoammoniumfoszfát, often abbreviated as MAP, is an inorganic salt with the chemical formula NH₄H₂PO₄. It is a common component of fertilizers and is also used as a fire suppressant. MAP is typically produced by reacting ammonia (NH₃) with phosphoric acid (H₃PO₄). In its pure form, it is a white crystalline solid.

As a fertilizer, MAP provides essential nutrients for plant growth, specifically nitrogen and phosphorus. These elements are crucial for various plant processes, including photosynthesis, root development, and energy transfer. The phosphorus in MAP is readily available for plants to absorb. Its dual nutrient content makes it a versatile fertilizer for a wide range of crops and soil conditions.

Beyond agriculture, monoammoniumfoszfát is a key ingredient in many dry chemical fire extinguishers. When exposed to heat, MAP decomposes and releases ammonia and phosphoric acid. The phosphoric acid reacts with the fuel, forming a glassy, non-combustible coating that smothers the fire. This property makes it effective against Class A, B, and C fires, which involve ordinary combustibles, flammable liquids, and electrical equipment, respectively. MAP is also used in some food additives and in the production of other chemicals.