Bismuth nitrate is widely used in the production of bismuth compounds, which are essential in various industries. It serves as a precursor in the synthesis of bismuth oxychloride, a key ingredient in cosmetics, particularly in pearlescent pigments for makeup products like nail polishes and eyeshadows. In the pharmaceutical industry, it is utilized to create bismuth subsalicylate, a common active ingredient in medications for treating gastrointestinal issues such as diarrhea, heartburn, and indigestion. Additionally, bismuth nitrate is employed in the manufacturing of catalysts for chemical reactions, particularly in the production of acrylic fibers and plastics. It also finds application in the ceramics industry, where it is used to create glazes and enamels with unique optical properties. Furthermore, it plays a role in laboratory research as a reagent for analytical chemistry and material science studies.