Used primarily in organic synthesis, 3-Hydroxy-2-nitrobenzaldehyde serves as a key intermediate in the production of various pharmaceuticals and dyes. Its structure allows it to participate in reactions that form complex molecules, particularly in the development of compounds with potential biological activity. Additionally, it is utilized in the synthesis of agrochemicals, contributing to the creation of pesticides and herbicides. Its nitro and aldehyde functional groups make it a versatile reagent in chemical research and industrial applications.