2,4-Dihydroxybenzamide is an organic compound with the formula C7H7NO3. 2,4-Dihydroxybenzaldehyde, as an aromatic aldehyde, is widely used in dyes, medicine, pesticides, fragrances, materials and other fields. As an important class of fine chemical raw materials, it has great application value and significance in organic synthesis, chemical analysis, coordination chemistry, chemical additives, drugs, pesticides, dyes, luminescent materials, photosensitive materials, etc.