Benzofuran-5-boronic Acid CAS 331834-13-0
| CAS No. | 331834-13-0 |
| Molecular Formula | C8H7BO3 |
| Molecular Weight | 161.95 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including Benzofuran-5-boronic Acid.
Benzofuran-5-boronic Acid (CAS 331834-13-0) is a high-purity analytical reference standard with the molecular formula C8H7BO3 and a molecular weight of 161.95 g/mol.
Benzofuran-5-boronic Acid (C8H7BO3) 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).
Recommended for analytical method development and validation; each product is supplied with a full Certificate of Analysis (COA) ensuring ISO 17034 metrological traceability.
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 | C8H7BO3 |
| Molecular Weight | 161.95 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 5.5 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2025 |
Related Benzofuran Standards
- Benzofuran-7-boronic acid (CAS 1432610-21-3)
- Benzofuran-3-boronic acid (CAS 317830-83-4)
- Benzofuran-4-ylboronic acid (CAS 860625-79-2)
- Benzofuran-6-boronic Acid (CAS 851525-10-5)
- Benzofuran-3-carboxylic acid (CAS 26537-68-8)
- Benzofuran-7-carboxylic Acid (CAS 90484-22-3)
- Benzofuran-5-carboxylic Acid (CAS 90721-27-0)
- Benzofuran-4-carboxylic Acid (CAS 166599-84-4)
Recommended Standards
- N,N-Dimethylphosphoramidic Dichloride (CAS 677-43-0)
- 7-Azaindole-5-boronic Acid (CAS 944059-24-9)
- Olprinone Impurity 9 (CAS 913835-63-9)
- 2-Amino-4-cyanophenylboronic Acid (CAS 850689-37-1)
- Ethyl 6-methyl-2-oxo-1,2-dihydropyrimidine-4-carboxylate (CAS 264606-77-1)
- 4-(Benzylamino)butanenitrile (CAS 71510-64-0)
- 3-Fluoro-4-isopropoxypyridine (CAS 1782813-81-3)
- 5-((Naphthalen-2-ylthio)methyl)isoxazol-3(2H)-one (CAS 89660-90-2)
- 1-(Pyridin-2-yl)pentan-1-amine (CAS 94032-53-8)
- 5’-Boc-4’,5’-dihydro-1’H-spiro[cyclopropane-1,6’-pyrrolo[3,4-c]pyrazol]-3’-amine (CAS 946497-95-6)
- Timolol EP Impurity G (CAS 75202-36-7)
- 2,3-Dichloro-5-(difluoromethyl)-4-iodopyridine (CAS 1805327-79-0)
- 2,2,2-Trifluoroethyl (3-chloro-2-morpholinophenyl)carbamate (CAS 1375238-97-3)
- Neuropeptide Y (3-36) (human, rat) trifluoroacetate salt (CAS 150138-78-6)
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