Used primarily in organic synthesis as a photoredox catalyst in visible-light-driven reactions. It facilitates carbon-carbon and carbon-heteroatom bond formations under mild conditions, making it valuable in pharmaceutical and fine chemical manufacturing. Its strong absorption in the visible spectrum allows efficient activation using low-energy light sources. Commonly applied in radical additions, cyclizations, and cross-coupling reactions where traditional metal catalysts may fail. Also explored in materials science for developing light-responsive systems.