Benzofuran-3-carboxylic acid CAS 26537-68-8
| CAS No. | 26537-68-8 |
| Molecular Formula | C9H6O3 |
| Molecular Weight | 162.14 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
Benzofuran-3-carboxylic acid (CAS 26537-68-8) is a high-purity analytical reference standard with the molecular formula C9H6O3 and a molecular weight of 162.14 g/mol.
Benzofuran-3-carboxylic acid (C9H6O3) contains a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system. It is notably hygroscopic, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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.
Physical & Chemical Properties
| Molecular Formula | C9H6O3 |
| Molecular Weight | 162.14 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) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1964 |
Related Benzofuran Standards
- Benzofuran-7-carboxylic Acid (CAS 90484-22-3)
- Benzofuran-5-carboxylic Acid (CAS 90721-27-0)
- Benzofuran-4-carboxylic Acid (CAS 166599-84-4)
- 2-(Benzofuran-5-Yl)Ethanol (CAS 1000548-28-6)
- (1R)-1-(1-benzofuran-3-yl)ethan-1-ol (CAS 1059698-12-2)
- (1r)-1-(1-Benzofuran-2-yl)ethan-1-ol (CAS 119678-66-9)
- 2-(Benzofuran-6-yl)ethanol (CAS 169785-09-5)
- 1-(Benzofuran-7-yl)ethanol (CAS 181819-95-4)
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- Ethyl 2-phenyl-6-(trifluoromethyl)nicotinate (CAS 149770-27-4)
- (r)-2-Amino-2-(3-bromo-4,5-dimethoxyphenyl)ethan-1-ol (CAS 1212808-02-0)
- (S)-6,7-Dihydroxy-1,2,3,4-tetrahydroisoquinoline-3-carboxylic acid (CAS 34312-81-7)
- 4-({[(thiophen-2-yl)methyl]amino}methylidene)-3-(trifluoromethyl)-4,5-dihydro-1H-pyrazol-5-one (CAS 240115-98-4)
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