Used as an intermediate in the synthesis of dyes and pigments, particularly for producing azo dyes that exhibit good light and heat stability. It also serves in the preparation of fluorescent whitening agents for textiles and paper. Additionally, it finds application in the development of certain pharmaceuticals and agrochemicals due to its aromatic amine functionality, which can be further modified in multi-step reactions. Its chlorinated naphthalene structure contributes to enhanced reactivity and binding properties in organic synthesis.