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 or visible light. Common applications include dental composites, adhesives, inks, and coatings, where rapid curing under light exposure is required. Its ability to absorb light in the long-wavelength UV to visible range makes it suitable for formulations exposed to dental curing lamps. It is often combined with co-initiators like tertiary amines to enhance curing efficiency and depth. Due to good solubility in organic matrices and low volatility, it provides consistent performance in thin films and complex resin systems.