Acenaphthylene is primarily used in the production of dyes and pigments, where it serves as a key intermediate in synthesizing complex colorants. Its structure allows it to form stable aromatic compounds, making it valuable in creating vibrant and durable dyes for textiles, inks, and plastics. Additionally, it is utilized in organic synthesis to produce naphthalene derivatives, which are essential in manufacturing pharmaceuticals and agrochemicals. In research, acenaphthylene is often employed as a model compound in studies related to aromatic hydrocarbons and their reactivity. It also finds application in the development of organic semiconductors, contributing to advancements in electronic devices and materials science.