Meso-tetraphenylporphyrin is widely used in the field of catalysis, particularly in the oxidation of organic compounds. Its ability to form complexes with metals makes it valuable in creating catalysts for various chemical reactions, including the oxidation of hydrocarbons and the degradation of pollutants.

In the medical field, this compound is utilized in photodynamic therapy (PDT) for cancer treatment. It acts as a photosensitizer, absorbing light and producing reactive oxygen species that can destroy cancer cells. Its application in PDT is due to its strong absorption of light in the visible spectrum and its ability to generate singlet oxygen efficiently.

Additionally, meso-tetraphenylporphyrin is employed in the development of sensors and molecular electronics. Its unique electronic properties make it suitable for use in chemical sensors that detect gases or other substances. In molecular electronics, it is explored for its potential in creating organic semiconductors and other electronic components.

In research, it serves as a model compound for studying the properties of porphyrins and their metal complexes. This helps in understanding the behavior of similar compounds in biological systems and industrial applications. Its structural stability and ease of modification make it a valuable tool in synthetic chemistry and materials science.