IR 676 Iodide is primarily used in the field of photodynamic therapy (PDT) and medical imaging. It serves as a photosensitizer, which, when exposed to light, generates reactive oxygen species to destroy cancer cells or pathogens. This makes it valuable in treating certain types of cancers and bacterial infections. Additionally, its fluorescent properties are utilized in bioimaging to visualize and study cellular structures and processes in research and diagnostics. Its application extends to material science, where it is used in the development of advanced optical materials and sensors.