| Appearance | White to beige/cream solid powder or crystalline solid |
| Melting Point | ~133–138 °C (clear melt) |
| pH of Liquid, Typical (10% soln) | Not routinely specified for this solid (aqueous pH not standard) |
| Specific Gravity Approx | ~1.26–1.40 g/cm³ (solid density estimate) |
| Odor | Characteristic slight phenolic odor (not typically specified) |
| Color | White to beige/light cream (occasionally pale pink to pale brown) |
| Linear Formula | (HO)₂C₆H₃CHO |
| IUPAC Name | 2,4‑dihydroxybenzaldehyde |
| Formula Weight | 138.12 g/mol |
| percent purity | Typically ≥ 97.5–98 % |
| Physical Form | Solid (powder or crystalline) |
| Chemical Name or Material | 2,4‑Dihydroxybenzaldehyde (a dihydroxy substituted benzaldehyde) |
| Content / Assay Percent Range | ≥ 97.5 % (GC) |
| 7213 |
2,4-Dihydroxybenzaldehyde is an aromatic compound featuring a benzene ring substituted with two hydroxyl groups at the 2- and 4-positions and an aldehyde functional group. It is commonly used as an intermediate in organic synthesis, pharmaceuticals, dyes, and fine chemical research. The compound is typically a solid with yellow to light brown colouration and is valued for its reactivity in forming Schiff bases, phenolic derivatives, and other functionalized aromatic molecules.
Synonym: beta-resorcylaldehyde, 4-hydroxysalicylaldehyde, 4-formylresorcinol, beta-resorcaldehyde, benzaldehyde, 2,4-dihydroxy, beta-resorcinaldehyde, beta-resorcylic aldehyde, 2,4-dihydroxybenzenecarbonal, salicylaldehyde, 4-hydroxy, 4-hydroxysalicyladehyde
