Used as a multifunctional thiol crosslinking agent in UV-curable resin systems, enabling rapid curing under ultraviolet light. It is widely applied in coatings, inks, adhesives, and 3D printing resins via photopolymerization due to its ability to form dense, durable networks with low shrinkage, excellent adhesion, and improved mechanical properties such as strength, scratch resistance, and chemical resistance. The thiol groups react quickly with acrylate groups under UV light. Commonly used in industrial printing, electronics encapsulation, and protective coatings where high reactivity and low odor are required. Also serves as a chain transfer agent in polymer synthesis to control molecular weight and improve material flexibility.