Dicalcium phosphate is the calcium phosphate with the formula CaHPO and its dihydrate. The "di" prefix in the common name arises because the formation of the HPO 2– anion involves the removal of two protons from phosphoric acid, H PO . It is also known as dibasic calcium phosphate or calcium monohydrogen phosphate
Monoammonium phosphate (MAP) is a widely used source of phosphorus (P) and nitrogen (N). * It's made of two constituents common in the fertilizer industry and contains the most phosphorus of any common solid fertilizer. Production. The process for manufacturing MAP is relatively simple.