Commonly known as dap, di-ammonium phosphate is manufactured by reacting 1 mole of phosphoric acid (produced from mined phosphate rock) with 2 moles of ammonia; the resulting slurry is solidified into a granular form. N as ammoniacal nitrogen %- 18 % and P % as P2O5- 46 %.
Di-Ammonium Phosphate – DAP
+ Free Shipping| Synonyms | DAP-18-46-00 |
| Packing | 25/50/1000 Kgs HDPE Bags With inner liners. |
| Applications | Industrial grade |
| Standard | Industrial grade |
| Molecular Formula | (NH4)2HPO4 |
| Molecular weight | 132.06 g/mol |
| Density | 1.62 g/cm3 |
| CAS No. | 7783-28-0 |
Properties
- Water soluble
- Varying shades of brown
Advantages
- Provides a source of phosphorus in phosphate form, accompanied by a higher nitrogen content than map.
- Nitrogen is in ammonium form, which is readily-available for plant uptake.
- Higher solubility than map
Drawbacks
- Produces a higher localized PH in the soil than map, which can hinder seed germination and nutrient uptake under certain soil conditions.
- Greater potential for nitrogen loss than map when surface-applied
Application
- Broadcast (surface-applied) or banded (adjacent to the seedbed)
- Used most commonly in blends with varying combinations of n, k and micronutrients
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