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DIAMMONIUM PHOSPHATE (DAP): EXPLAINED

DIAMMONIUM PHOSPHATE (DAP): EXPLAINED

Context:

A severe shortage of di-ammonium phosphate (DAP) in Haryana has seen farmers throw stones at police, block roads and protest, and even try to “loot” fertilizer at a private market in the Mahendragarh district south of Haryana.

About Diammonium phosphate (DAP):

  • It is the world's most widely used phosphorus fertilizer. It is used as a fertilizer when used as plant food, it temporarily raises the pH of the soil, but over time the milled soil becomes more acidic than before when nitrification of ammonium is added.
  • DAP can be used as a fire retardant or extinguisher. Reduces the combustion temperature of the material, reduces the high levels of weight loss and causes an increase in the production of residues or char.
  • DAP is also used as a yeast nutrient in winemaking and mead-making.

Chemical formula - (NH4)2(HPO4) is one of a series of water-soluble ammonium phosphate salts that can be produced when ammonia reacts with phosphoric acid.

DAP’s Occurrence:

  • The compound occurs in nature as the rare mineral phosphammite.
  • The related dihydrogen compound occurs as the mineral biphosphammite. Both are related to guano deposits.

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