Used in the production of ceramic glazes and glass to improve hardness and durability. Commonly employed in the manufacturing of rat poison and pesticides due to its toxicity to rodents and insects. Serves as a flux in the formulation of welding agents and in the removal of sulfate impurities in refining zinc. Applied in the production of certain electronic components and specialty barium compounds. Also utilized in the brick and tile industry to reduce efflorescence by controlling soluble salts.