​As a typical molybdate, ammonium heptamolybdate is also called ammonium paramolybdate. It is a colorless to light green crystalline powder composed of transition metal molybdenum, non-metallic oxygen, hydrogen and nitrogen. It is an ammonium molybdate composed of ammonium ions and heptamolybdate ions. Its name can be divided into Ammonium heptamolybdate or Ammonium paramolybdate. Its chemical formula is (NH4)6Mo7O24, its molar mass is 1163.9g/mol, and its CAS registration number is 12027-67-7 or 12054-85-2 (tetrahydrate).