Used as an intermediate in the synthesis of pharmaceuticals and agrochemicals, particularly in the production of certain antimicrobial and antifungal agents. It serves as a building block in organic reactions due to the presence of both aldehyde and hydroxyl functional groups, enabling Schiff base formation and ring substitution reactions. Commonly employed in the development of dyes and fragrances where chlorinated aromatic aldehydes contribute to stability and specific olfactory properties. Also utilized in research for designing novel bioactive molecules and coordination compounds with metal ions for catalytic or medicinal applications.