3,5-Diiodosalicylic Acid is a halogenated derivative of salicylic acid containing two iodine atoms substituted on the aromatic ring. It typically appears as an off-white to light brown crystalline solid. With both hydroxyl and carboxylic acid functional groups, it serves as a reactive intermediate in organic synthesis. This compound is mainly used in the pharmaceutical and fine chemical industries for the production of active compounds, iodine-rich molecules, and research chemicals.