PPHP is widely used as a photoinitiator in the curing of inks, coatings, and adhesives. It is particularly effective in UV-curable systems, where it helps initiate the polymerization process when exposed to ultraviolet light. This makes it valuable in industries such as packaging, automotive, and electronics, where fast and efficient curing is essential. Additionally, PPHP is known for its stability and compatibility with various formulations, ensuring consistent performance in different applications. Its ability to produce high-quality finishes with minimal yellowing makes it a preferred choice for clear coatings and decorative finishes.