Used primarily as a photoinitiator in UV-curable systems, this compound plays a key role in polymer chemistry. It is especially effective in free-radical polymerization reactions triggered by ultraviolet light. Common applications include ink formulations, coatings, adhesives, and dental composites where rapid curing under UV light is required. Its ability to initiate curing even in low-light conditions makes it suitable for thick or pigmented formulations. It is often chosen for systems requiring deep cure and minimal oxygen inhibition.