Used primarily as a photoinitiator in UV-curable systems. It is effective in free radical polymerization of acrylates and methacrylates upon exposure to UV light. Commonly applied in coatings, inks, and adhesives where deep cure and low yellowing are required. Shows good performance in pigmented systems due to its absorption profile. Also used in dental composites and 3D printing resins for its efficient initiation and compatibility with other photoinitiators.