Ammonium phosphates triammonium phosphate

Ammonium Phosphate. Ammonium phosphates have a long history of use as a fertilizer. They are not as easily leached from the soil as ammonium nitrate, but cannot be made in high nitrogen concentrations. There are three forms of ammonium phosphate monoammonium phosphate (MAP, NH4H2P04), diammonium phosphate (DAP, [NH4]2HP04), and triammonium phosphate (TAP, [NH4]3P04). Unfortunately, triammonium phosphate is unstable and loses ammonia easily. Ammonium phosphates are produced by reacting ammonia with phosphoric acid (Reaction 3.8). 

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