👉 In chemistry, a phosphonate is a type of organic compound that has one or more phosphate groups attached to it. Phosphorus (P) and nitrogen (N) are common elements in phosphonates. The structure of a phosphonate molecule can be represented by the formula C12H10N4O2P, where C represents carbon, H represents hydrogen, N represents nitrogen, O represents oxygen, and P represents phosphate groups. Phosphonates have various applications