Widely used as a blue pigment in coatings, plastics, and printing inks due to excellent stability and intense color. Common in automotive paints and industrial finishes for its resistance to heat, light, and chemicals. Employed in photovoltaic cells and organic semiconductors for its electrochemical properties. Also investigated in photodynamic therapy for cancer treatment, where it acts as a photosensitizer under light exposure to generate reactive oxygen species. Used in sensors and catalytic applications due to its ability to facilitate electron transfer.