Used as an intermediate in the synthesis of pharmaceuticals, particularly in the production of antiseptic and antimicrobial agents. It plays a key role in the development of active ingredients for disinfectants and preservatives due to its reactive functional groups. Also utilized in the preparation of dyes and specialty polymers where chlorinated aromatic structures enhance stability and performance. Its aldehyde group allows for easy modification in organic synthesis, making it valuable in research and industrial applications involving fine chemicals.