Diammonium Phosphate (DAP)

Airedale Chemical Diammonium Phosphate is available as both Food Grade and Technical Grade variants across crystal and solution forms. DAP holds the formula (NH4)2HPO4 and is primarily used as in waste oil demetallation as well as a fertilizer in in agricultural formats.

Airedale Chemical Diammonium Phosphate (DAP) is available as both a compound solid that takes the form of a white odourless powder and as a solution however when blended for different applications.

As a leading Diammonium Phosphate manufacturer and supplier we can facilitate orders including 25 litre, 200 litre, 1000 litre and bulk transfer. We are also a Diammonium Phosphate distributor, covering the UK, Europe and Ireland with our dedicated distribution fleet of vehicles. Contact Airedale Chemical today to discuss your requirements.

Other names: Ammonium Monohydrogen Phosphate, Ammonium Phosphate Dibasic
For more information call 01535 637876

Grade: TECH

This product is available in the following sizes

  • 25L Drum
  • 200L Drum
  • Bulk Transfer
  • 25kg Bag Solid/Powder only chemicals



Fertilizer - When applied as plant food, it temporarily increases the soil pH, but over a long term the treated ground becomes more acidic than before upon nitrification of the ammonium.

Food & Beverage

Used as a yeast nutrient in winemaking and brewing mead In purifying sugar

Metal Processing

As a Flux for soldering tin, copper, zinc and brass

Oil & Gas

Demetallation - Used oil invariably contains soluble and insoluble metal-bearing compounds. The presence of these compounds complicates the recycling of used oil as a fuel. Demetallating a used oil before its burning minimizes maintenance problems. DAP aids water dispersion throughout this process.


Control precipitation of alkali-soluble and acid-insoluble colloidal dyes on wool

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