Diammonium phosphate or DAP with the (NH4)2HPO4 as its chemical formula is grouped as water-miscible salts of ammonium phosphate Which can be procured when a reaction between ammonia and phosphoric acid has occurred. This fertilizer includes 18% of nitrogen and 46% of phosphorus pentoxide. It is mainly procured in granular shape for direct application as a fertilizer for plants or for mixing with other fertilizers. The main components for composite fertilizers utilized in the United Kingdom are urea, mono, and diammonium phosphate and potassium chloride. These composite fertilizers, or composites of two or three of the main plant foods (nitrogen, phosphorus, and potassium). Other necessary elements for plants such as pesticides, can also be added, however, this routine is not common right now. another additive to this fertilizers is Sulphur which helps plants to grow better.
physical and chemical properties of Diammonium phosphate (DAP)
Diammonium phosphate Applications
DAP is utilized as a fertilizer When this product is applied as plant nutrition, it provisionally cause an increase in pH of the soil, but after a long period of time, the soil turns to more acidic soil. It is discordant with alkaline materials because its ammonium ion want to transform to ammonia in a high-pH media. The mean pH in solution is 7.5–8. The common formula is 18-46-0 (18% N, 46% P2O5 and 0% K2O).DAP also can lowers the combustion temperature of the components , reduces maximum weight loss rates.