Used primarily in hair dye formulations as an oxidative coupler, 6-Amino-m-cresol contributes to the development of long-lasting, natural-looking hair colors. It reacts with other dye precursors, such as primary intermediates like p-phenylenediamine, in the presence of hydrogen peroxide to form larger colored molecules that remain trapped within the hair shaft. This compound is especially effective in producing a range of brown to black shades and enhances color intensity and uniformity. Due to its small molecular size, it penetrates the hair cuticle efficiently, ensuring even color development and improved dye performance. It is commonly found in permanent and semi-permanent hair color products.