This water-soluble porphyrin derivative is a specialty chemical with prominent photosensitive and fluorescent properties. It is widely used in analytical chemistry and biochemistry as a fluorescent indicator or tracer for studying chemical reactions and biological processes. In medicine, it plays a key role in photodynamic therapy (PDT) for cancer treatment by generating reactive oxygen species (ROS) upon light exposure, enabling selective destruction of cancer cells. It is also employed in photodynamic antimicrobial chemotherapy (PACT) to combat antibiotic-resistant bacterial infections. Environmentally, its photocatalytic abilities aid in water purification by degrading organic pollutants under light. Additionally, it serves as a photosensitizer in dye-sensitized solar cells to improve energy conversion efficiency from light to electricity. In research, it facilitates investigations into light-induced chemical reactions and energy transfer mechanisms.