Used as an intermediate in the synthesis of pharmaceuticals, particularly in the development of sulfonamide-based drugs with antimicrobial and anti-inflammatory properties. It serves as a building block in organic reactions, especially in the formation of imines and Schiff bases, which are valuable in medicinal chemistry. Its aldehyde group allows for easy functionalization, enabling the creation of more complex molecules for drug discovery and development. Also utilized in the preparation of dyes and functional materials due to its aromatic and reactive sulfonamide structure.