DAP (diammonium phosphate) KNOWLEDGE

Diammonium phosphate, also known as ammonium hydrogen phosphate, diammonium phosphate (DAP), is a compound fertilizer containing two nutrients, nitrogen and phosphorus, with gray or dark gray particles. Diammonium phosphate is easily soluble in water but insoluble in ethanol; it has certain hygroscopicity and is easily decomposed in humid air, and volatilizes ammonia into ammonium dihydrogen phosphate.

Fertilizer introduction

Diammonium phosphate, also known as diammonium hydrogen phosphate, ammonium hydrogen phosphate, is a white crystal, the molecular formula is (NH4)2HPO4, soluble in water, heated to 155 ℃ to decompose, but it may also be gradually decomposed at room temperature Ammonia gas is released to form ammonium dihydrogen phosphate.

The aqueous solution is weakly alkaline, pH 8.0.

Product specifications are: 64% (N18: P2O546), 61% (N17: P2O545), 57% (N15: P2O542). In order to increase the storage resistance, some products are added with a coating agent during the production process, so that the appearance of the product is brown or yellow.

Functional use

Diammonium phosphate is a high-concentration quick-acting fertilizer, suitable for various crops and soils, especially for crops that like nitrogen and phosphorus.

Physical properties of the product: This product is easily soluble in water and has less solids after dissolving. It is suitable for the needs of various crops for nitrogen and phosphorus elements, especially suitable for base fertilizer, seed fertilizer and top dressing in arid areas with little rainfall.

Application: High performance nitrogen and phosphorus binary fertilizer.

Common specifications: physical neutral fertilizer, suitable for any soil and most crops, especially suitable for crops that prefer ammonium and phosphorus, and can be used as base fertilizer or top dressing, and should be applied deeply. It is used as a curing agent for urea-formaldehyde resin adhesive. It is formulated into a 20% aqueous solution and has the slowest curing speed. Also used as additive flame retardant. If a small amount of DAP is added to the natural rubber latex, the magnesium ions in the latex can be effectively eliminated without reducing the tensile strength of the natural latex after vulcanization.

Application: It has good miscibility with urea, ammonium nitrate and ammonium chloride. Because it does not contain potassium, it should be used in conjunction with potassium fertilizers (potassium chloride, potassium sulfate).