Di ammonium phosphate, (nh4)2hpo4, is manufactured by the reaction of ammonia and phosphoric acid.

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Its nitrogen to phosphate ratio makes it an excellent direct application product or one that blends well with other fertilizer materials to produce a variety of npk fertilizers. Dap is typically 90% water-soluble (expressed as a percentage of available p2o5).

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The typical ph of the product is 7.5 when it is measured on saturated slurry of the product.

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In the soil, the initial stages of the product's breakdown releases ammonia (nh3) and causes a small zone around the dap particles in the soil to have a ph of about 8.0. After a short time and as the dap continues to breakdown, the product has a net effect of acidifying the soil.

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Di-ammonium phosphate, analysis 18-46-0, is the worlds most widely used ammo-phos fertilizer. Dap is easily adapted to all ranges of dry fertilizer application methods. Dap is a perfect choice, as a base product for custom blends. The high analysis of 18-46-0, also aids in reducing handling, freight, and application costs.