Used as a photoinitiator in polymer chemistry, particularly in UV-curable systems. It decomposes under ultraviolet light to generate free radicals, initiating the polymerization of monomers and oligomers in coatings, inks, and adhesives. Also employed in the synthesis of light-responsive materials due to its reversible photoisomerization properties. Its azo group enables use in studies involving controlled release systems and smart materials that respond to light stimuli.