N,N-Dimethyl-1-naphthylamine is primarily used in organic synthesis as an intermediate for the production of dyes and pigments. It plays a key role in the development of colorants for textiles, inks, and coatings, contributing to vibrant and stable hues. Additionally, it is utilized in the synthesis of certain pharmaceuticals, where it acts as a building block for active compounds. In analytical chemistry, it is employed as a reagent in the Griess test for detecting nitrites in water and other samples, producing a characteristic red azo dye. Its application extends to research laboratories, where it serves as a reagent in various chemical reactions, particularly in the study of aromatic amines and their derivatives.