BaSO4 is the chemical formula of Barium sulfate
Barium sulfate is insoluble in water; after filtration remain on the filter and sodium chloride pass as a solution.
Its I.U.P.A.C name is Ba[S(O)4] Barium tetra oxo sulphurate (vi)
The solubility product constant (Ksp) for barium sulfate (BaSO4) is approximately 1.1 x 10^-10. This means that at equilibrium, the product of the concentrations of the ions (Ba2+ and SO4^2-) in a saturated solution of BaSO4 is equal to 1.1 x 10^-10.