meso-Tetra (4-methoxyphenyl) Porphine (PPN12783) is a synthetic porphyrin compound. It exhibits photodynamic effects and has demonstrated cytotoxicity against human cancer cells in research. PPN12783, combined with polystyrene, is used in the production of electrospun nanofiber membrane sensors. Furthermore, it is employed in constructing optically active porphyrin supramolecular assemblies through the air-water interface assembly process.