Used primarily as a photoinitiator in UV-curable systems such as inks, coatings, and adhesives. It efficiently generates free radicals upon exposure to ultraviolet light, enabling rapid polymerization of acrylate-based resins. Particularly effective in pigmented systems where deeper cure is required, due to its ability to absorb light in the long-wavelength UV range. Also utilized in 3D printing resins and dental composites where fast curing and low yellowing are critical. Shows good compatibility with other photoinitiators and co-initiators to tailor cure speed and depth.