About Diammonium Phosphate. Diammonium Phosphate (a.k.a. DAP, Diammonium Hydrogen Phosphate) is an important ammonium phosphate salt, widely used as a fertilizer all over the world. Among phosphate-based fertilizers, DAP stands out by having excellent physical properties and high nutrient content.

Diammonium Phosphate should be stored in cool, dry and ventilated area. It must be protected from moisture. DAP is transported in bulk, in 50 kg bags and in 1,000 kg - 1,200 kg big bags.

Since the 1960s, when ammonium phosphate fertilizers became available, Diammonium Phosphate quickly became the main phosphate-based fertilizer. It is produced by combining phosphoric acid with ammonia, in such a way that different manufacturing routes are related to different sources of such raw materials. Raw materials and the respective production processes employed in the manufacturing of Diammonium Phosphate are listed below.

The uses and applications of Diammonium Phosphate may vary according to its specification. The main forms of Diammonium Phosphate are commercial/fertilizer grade (18% N, 46% P2O5) and food grade (99% minimum purity).

By far the most important application of DAP is as fertilizer. In addition to being an excellent source of phosphorous (P) and nitrogen (N) for plant nutrition, it combines outstanding properties that make it in fact one of the most important fertilizers, such as high solubility and slight alkaline pH around the dissolving granules. To a lesser extent, DAP is also used as fire retardant, in metal finishing, yeast/microbial fermentation nutrient, sugar purification and precipitation control for alkali-soluble and acid-insoluble compounds.