Sodium Bisulfite Solution 40 % is a clear, yellowish liquid with a sulfur dioxide odor. It is use as DE chlorination in municipal wastewater, pulp & paper, power, and
textile water treatment plants , Oxygen scavenger , Boiler water treatment Preservative in photo developer process , Food additive , Flue gas desulfurization Mild reducing agent in organic synthesis , Efficiently remove traces or excess amounts of bromine, iodine, osmate esters, chromium trioxide, and potassium permanganate.