Used as a photoinitiator in UV-curable inks and coatings, enabling rapid curing under ultraviolet light. It is particularly effective in inkjet printing formulations due to its solubility in polar solvents and ability to generate free radicals upon exposure to light. Also employed in dental composites and adhesives where low migration and high reactivity are required. Its hydrophilic nature improves compatibility with aqueous systems, making it suitable for environmentally friendly coatings.