Fluorophosphoric Acid, 50%, CAS 10163-15-2, (also known as hexafluorophosphoric acid or fluophosphoric acid) has the formula H2PO3F. It is a corrosive chemical, like all salts of fluorosilicic acid. Fluoroboric acid finds use as an intermediate in the diazo salt stabilization and as a precursor intermediate for the manufacture of sodium and potassium fluorophosphate.