Used primarily as a photoinitiator in UV-curable systems. It is highly effective in free radical polymerization reactions triggered by ultraviolet light. Commonly found in inks, coatings, adhesives, and dental materials where rapid curing under UV light is required. Offers good solubility in monomer formulations and provides efficient initiation even under low-intensity UV sources. Particularly useful in pigmented systems due to its absorption characteristics in the long-wavelength UV range.