Methyl 2-formyl-4-hydroxybenzoate CAS 1701806-37-2
| CAS No. | 1701806-37-2 |
| Molecular Formula | C9H8O4 |
| Molecular Weight | 180.16 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
Methyl 2-formyl-4-hydroxybenzoate (CAS 1701806-37-2), molecular formula C9H8O4 and molecular weight 180.16 g/mol, is a CATO reference standard with documented purity and traceability.
The molecular framework of Methyl 2-formyl-4-hydroxybenzoate (C9H8O4) is characterized by a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system. In reversed-phase chromatography, its retention is governed primarily by the polarity and ionization state of its functional groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
Physical & Chemical Properties
| Molecular Formula | C9H8O4 |
| Molecular Weight | 180.16 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 6.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1994 |
Related Methyl Standards
- 3-Formyl-2-methoxybenzoic acid (CAS 1289170-62-2)
- Methyl 2-Formyl-3-hydroxybenzoate (CAS 131524-43-1)
- Methyl 2-formyl-6-hydroxybenzoate (CAS 136192-84-2)
- Methyl 2-formyl-5-hydroxybenzoate (CAS 1361963-60-1)
- N-(6-Formyl-4-hydroxypyridin-2-yl)acetamide (CAS 1393533-89-5)
- Methyl 3-formyl-5-hydroxybenzoate (CAS 1393545-50-0)
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- 4-Formyl-2-methoxybenzoic acid (CAS 194928-58-0)
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- Semaglutide impurity 67 (CAS CATO-C4X-222667)
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