Used as a photosensitizer in photodynamic therapy (PDT) for cancer treatment due to its ability to generate reactive oxygen species under light irradiation. Its chlorinated phenyl groups enhance lipophilicity, improving cell membrane penetration and tumor targeting. Also applied in organic semiconductor materials and dye-sensitized solar cells because of its strong visible light absorption and thermal stability. Shows potential in catalysis, especially in oxidation reactions, leveraging the porphyrin core’s metal-coordinating properties.