Used primarily as a photoinitiator in UV-curable formulations. It is effective in free radical polymerization processes triggered by ultraviolet light. Commonly found in inks, coatings, adhesives, and dental composites where rapid curing under UV light is required. Offers good solubility in resin systems and efficient surface cure with minimal yellowing. Often combined with other photoinitiators to broaden the absorption range and improve overall curing performance.