Premium Di-Ammonium Phosphate (DAP) is the premium tech grade of conventional DAP with further control of arsenic and other impurities. It is a white crystal powder with assay ≥99%, P₂O₅ ≥53%, N ≥20.8% and water-insoluble matter ≤0.1%; the pH of a 1% solution is 7.8–8.2. With high purity, full water solubility and fast dissolution, it is suitable for applications requiring stricter impurity limits, such as flame retardants, fire-extinguisher powder, high-end water-soluble fertilizers and liquid fertilizer formulations.
