DESCRIPTION

Ferrous Ammonium Phosphate occurs as a greyish-green fine powder. It consists primarily of the anhydrous salt with small amounts of the hydrate. The final product is obtained by combining iron powder, phosphoric acid, and ammonia solution in demineralized water. The purification and spray drying processes remove any excess of starting materials (e.g. unreacted iron powder), insoluble salts, and volatiles, such as ammonia. The product is then milled into fine powder with the required particle size. It is insoluble in water, but is soluble in dilute mineral acids.