Skip navigation

Diammonium Phosphate

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.



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.

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.

Textile Chemicals & Dyes

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


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

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

DAP also acts as a fire retardant


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.

CAS Number:
EC Number:
Other names:
Ammonium Monohydrogen Phosphate, Ammonium Phosphate Dibasic
Product info download

Available in the following sizes.

25L Drum

200L Drum

1000L Container

Bulk Transfer

Enquire now

Enquire now.

    Please note:
    We are unable to sell chemicals to members of the public

    Do you require SDS?

    Sign up for updates.

      01535 637 876
      Explore our Group of companies to discover more

      This website uses cookies. You can read more information about why we do this, and what they are used for here.

      Accept Decline