Widely used as a blue or green pigment in coatings, plastics, and printing inks due to excellent lightfastness and thermal stability. Common in automotive paints and industrial coatings where durability is critical. Employed in photodynamic therapy as a photosensitizer to generate reactive oxygen species under light exposure. Applied in organic semiconductors and photovoltaic devices for its ability to facilitate electron transfer and absorb near-infrared light. Also utilized in gas sensors for detecting reducing gases due to its electrical response changes upon gas interaction.