Used in hair dye formulations as a coupler to produce stable, long-lasting color tones, particularly in shades of brown and black. It enhances color intensity and helps achieve desired hues when combined with primary intermediates like p-phenylenediamine. Also employed in some skin-lightening products due to its ability to inhibit tyrosinase, an enzyme involved in melanin production. Additionally, it serves as an intermediate in the synthesis of certain dyes, pharmaceuticals, and agrochemicals.