Chemical: - It is mainly used in the purification of brine solution in caustic chlorine plants,waste water treatement, the production of PVC stabilizers, Oil: - oil lubricants, barium cromate and barium fluoride. Mechanical/Rubber: - It is also used in the manufacture of heat treatment salts, - hardening of steel Dyes & Pigments: - manufacture of pigments Fireworks: - manufacture of other barium salts,in fireworks.