FeTCPP (Iron(III) meso-Tetra(4-carboxyphenyl)porphine chloride) is a metallic porphyrin compound formed by the coordination of a central iron ion (Fe3+) with four 4-carboxyphenylporphyrins (TCPP). FeTCPP can be used as a catalyst for catalytic, electrochemical, photochemical and biomedical research. FeTCPP has high photocatalytic performance for p-nitrophenol under visible light. FeTCPP also has peroxisase-like activity, which is used in bionic catalysis research.