The chemical formula for barium bisulfite is Ba(HSO3)2.
Barium bisulfite is a salt formed from barium and bisulfite ions. In this compound, the barium ion (Ba2+) pairs with two bisulfite ions (HSO3–). Each bisulfite ion consists of one hydrogen atom, one sulfur atom, and three oxygen atoms. This combination results in a neutral overall charge for the compound, reflecting the balance of the two bisulfite ions with the divalent barium ion.