Used in toothpaste for sensitive teeth, strontium chloride helps block dentin tubules, reducing pain from hot, cold, or acidic stimuli. It is also employed in pyrotechnics to produce red-colored flames in fireworks and signal flares due to its emission spectrum. In medicine, it has been used in radioisotope form for the treatment of bone cancer to relieve pain from metastases. Additionally, it serves in the electronics industry for the production of certain phosphors and in the refining of zinc to remove lead impurities.