Prussian blue is widely used as a pigment in paints, inks, and dyes due to its intense blue color and stability. In the medical field, it is employed as an antidote for certain types of heavy metal poisoning, particularly thallium and radioactive cesium, as it binds to these metals and facilitates their excretion from the body. Additionally, it finds applications in electrochemistry, where it is used in the development of sensors and biosensors due to its redox properties. In the art world, it is valued for its historical significance and use in traditional and restoration works. Its ability to absorb specific wavelengths of light also makes it useful in optical and photonic applications. Furthermore, it is utilized in water treatment processes to remove heavy metals and radionuclides due to its excellent adsorption properties.