Benzofuran-4-carboxylic Acid CAS 166599-84-4
| CAS No. | 166599-84-4 |
| Molecular Formula | C9H6O3 |
| Molecular Weight | 162.14 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
The occurrence of Benzofuran-4-carboxylic Acid is closely related to a carboxylic acid group, a hydroxyl group, an ether linkage, an aromatic ring system in its molecular formula, which determines its behaviour during synthesis, purification, or degradation.
Benzofuran-4-carboxylic Acid (CAS 166599-84-4), molecular formula C9H6O3 and molecular weight 162.14 g/mol, is a CATO reference standard with documented purity and traceability.
Benzofuran-4-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 presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
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 | C9H6O3 |
| Molecular Weight | 162.14 g/mol |
| Appearance | Off-white to pale yellow crystalline powder |
| Purity | >95% |
| 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.) | 2004 |
Related Benzofuran Standards
- Benzofuran-3-carboxylic acid (CAS 26537-68-8)
- Benzofuran-7-carboxylic Acid (CAS 90484-22-3)
- Benzofuran-5-carboxylic Acid (CAS 90721-27-0)
- 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)
Recommended Standards
- 3-Hydroxy-3-methylpentanedioic acid (CAS 503-49-1)
- 7-Hydroxycoumarin (CAS 93-35-6)
- 1,6-Anhydro-beta-D-galactose (CAS 644-76-8)
- 7-Hydroxy-4-chromone (CAS 59887-89-7)
- 2-(trifluoromethyl)benzene-1-carboximidamide (CAS 656813-83-1)
- 5-bromotricyclo[8.2.1.0^{3,8}]trideca-3(8),4,6-trien-13-one (CAS 362657-66-7)
- Methyl 3-chloro-5-[4-(methoxycarbonyl)phenyl]benzoate (CAS 1820685-78-6)
- Daprodustat Impurity 21 (CAS 918641-99-3)
- Methyl 4-acetoxybenzoate (CAS 24262-66-6)
- 5-Bromo-8-hydroxy-1,6-naphthyridine-7-carboxylic acid (CAS 606139-08-6)
- 7-Oxaspiro[3.5]Nonan-1-ol (CAS 1781125-92-5)
- 4-(tert-Butoxy)-3-cyclopropoxy-5-isopropylpyridine (CAS 1243444-63-4)
- 6-Bromohex-1-yne (CAS 66977-99-9)
- D-Ser32-Tirzepatide (CAS CATO-CPTD788692)
Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com