Lemuteporfin is a potent photosensitizer classified within the benzoporphyrin family. It exhibits minimal cytotoxicity even at relatively high concentrations (>3.0 µM) in the absence of light. Upon exposure to 690 nm red light, Lemuteporfin has been shown to effectively suppress tumor growth in murine models. This light-dependent activation significantly reduces the risk of skin photosensitivity to ambient sunlight post-stimultion, making Lemuteporfin a highly valuable photosensitizing agent for cancer research applications.