Used as an intermediate in the synthesis of dyes and pigments, particularly for azo dyes that exhibit good light and wash fastness. It plays a key role in the production of textile dyes and ink formulations. Also employed in the preparation of pharmaceuticals, especially in the development of sulfonamide antibiotics, where it serves as a building block for active compounds. Additionally, it finds use in agrochemical synthesis for certain herbicides and plant growth regulators. Its aldehyde and amino functional groups allow for versatile chemical modifications in organic synthesis.