Widely used as a photoinitiator in UV-curable systems, this compound plays a key role in initiating free radical polymerization upon exposure to ultraviolet light. It is especially effective in coatings, inks, and adhesives that require rapid curing under UV radiation. Its ability to absorb UV light efficiently and generate radicals makes it suitable for clear coatings and thin films where deep cure and low yellowing are important. Commonly found in wood, paper, and plastic coatings, it contributes to high surface cure and good through-cure performance. It is often combined with other photoinitiators to enhance curing speed and overcome oxygen inhibition in air. Due to its hydroxyl groups, it also offers improved compatibility with polar resins and reduced volatility in formulations.