Sodium sesquicarbonate is used in a variety of applications like to prepare detergents and soap, as an alkaline agent for cleaning, water softening, and leather tanning, as a pH regulator, raising agent, and anticaking agent in foods, and as a corrosion inhibitor for water purification. It is also used as a buffer in cosmetics. It's utilized in the archaeological: conservation of objects made of copper and copper alloys that have been corroded by salt water. It is also used as a precipitating water softener; it can combine with hard water minerals to form an insoluble precipitate, removing these hardness minerals from the water. Sales Specification Physical and Chemical Properties Bulk Density: 42-54lb/ft3 0.67-0.86g/cm3 Na2O, wt%: 41-42.9 Sodium (Na) content, wt %: 30.4-31.8 Total Alkalinity as Na2CO3, wt %: 69-72 Na2SO4, wt%: 0.05 max NaCl, wt%: 0.05 max Fe2O3, ppm: 10 max Arsenic, ppm: 3 max Heavy Metals as Pb, ppm: 10 max Packing 50 lb bag, 54 bags per pallet