Sinapyl alcohol is a monolignol primarily involved in the biosynthesis of lignin, a complex polymer that provides structural support and rigidity to plant cell walls, contributing to pathogen resistance and the formation of lignocellulosic biomass. In research and industrial contexts, it serves as a key intermediate for studying and engineering lignin modification in plants. Sinapyl alcohol-derived lignins are utilized in the production of biofuels, bioplastics, and other renewable materials. It is also explored in green chemistry for sustainable alternatives to petroleum-based products. Furthermore, sinapyl alcohol and its derivatives exhibit bioactive properties, with potential applications as antioxidants and in pharmaceutical development.