AVA Chemicals [P] Ltd. Offers Di-Ammonium Phosphate. AVA Chemicals [P] Ltd. Is an ISO 9001:2000 certified company. Di-Ammonium Phosphate has White Crystal appearance. The assay of this chemical is minimum 99.6% while the CAS Numbers are 7783-28-0. Ph of a 5% Solution of Di-Ammonium Phosphate is 8.0. It is a clear and colorless chemical that possess 0.001% Chloride [Cl] content, 0.005% Sulfate [SO4] content, 0.0005% Iron [Fe] content and 0.001% Lead [Pb] content.