Used in the production of specialty glass, including optical and cathode ray tube glass, to improve refractive index and durability. Commonly employed in the manufacture of ceramics and glazes, where it acts as a flux and enhances color development. Serves as a rodenticide in pest control formulations due to its toxicity to rodents. Utilized in the steel industry to remove sulfate impurities during the refining process. Applied in the production of certain pigments and coatings for improved stability and performance. Used in the electronics industry as a component in the formulation of certain types of capacitors and insulating materials.