October 27, 2015 aci Our Products Mono Calcium Phosphate Chemical formula :CaH4P2O8 CAS No. :7758-23-8 Description : Monocalcium phosphate is an inorganic compound with the chemical formula Ca(H₂PO₄)₂. It is commonly found as the monohydrate, Ca(H₂PO₄)₂·H₂O. Both salts are colorless solids.