Tin(IV) mesoporphyrin IX dichloride is primarily utilized in the field of medical research and therapeutic applications. It is studied for its potential use in photodynamic therapy, where it acts as a photosensitizer to target and destroy cancer cells when exposed to specific wavelengths of light. Additionally, this compound is investigated for its role in inhibiting heme oxygenase, an enzyme involved in the degradation of heme, which can be beneficial in treating conditions like jaundice and other disorders related to heme metabolism. Its unique properties also make it a candidate for use in biochemical studies to understand porphyrin-related processes and interactions.