5,7-dichloro-1-benzofuran-3-carboxylic acid CAS 1487607-63-5
| CAS No. | 1487607-63-5 |
| Molecular Formula | C9H4Cl2O3 |
| Molecular Weight | 231.03 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 5,7-dichloro-1-benzofuran-3-carboxylic acid.
5,7-dichloro-1-benzofuran-3-carboxylic acid (CAS 1487607-63-5), molecular formula C9H4Cl2O3 and molecular weight 231.03 g/mol, is a CATO reference standard with documented purity and traceability.
Owing to a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution, an aromatic ring system, 5,7-dichloro-1-benzofuran-3-carboxylic acid is typically off-white to pale yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 231.03 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
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.
As a certified reference material (CRM), 5,7-dichloro-1-benzofuran-3-carboxylic acid meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Physical & Chemical Properties
| Molecular Formula | C9H4Cl2O3 |
| Molecular Weight | 231.03 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor, low volatility) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry, keep tightly closed to prevent evaporation |
| 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; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1992 |
| Halogen Content | Cl-containing |
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Recommended Standards
- 2-Bromo-5-(trifluoromethyl)thiophene (CAS 143469-22-1)
- 4,7-Dichlorobenzofuran-3-carboxylic acid (CAS 1489438-50-7)
- 7-Bromo-5-fluoro-[1,2,4]triazolo[1,5-a]pyridin-2-amine (CAS 1398504-18-1)
- 2-Amino-6-bromo-8-fluoro-[1,2,4]triazolo[1,5-a]pyridine (CAS 1649478-38-5)
- Ethyl 2-amino-4-(4-chloro-5-methyl-1h-pyrazol-1-yl)butanoate (CAS 1340081-61-9)
- 4-Chloro-3-(difluoromethoxy)benzenesulfonyl chloride (CAS 929341-75-3)
- Dihexadecyl disulfide (CAS 1561-75-7)
- 4-(1-(Dimethylamino)ethyl)phenol hydrochloride (CAS 1049692-05-8)
- 4-(2,2,2-Trifluoroethoxy)benzo[b]thiophene-6-carboxylic acid (CAS 1291488-30-6)
- Octafluoroadipoyl chloride (CAS 336-06-1)
- 4-((5-Bromopyrimidin-2-yl)oxy)benzonitrile (CAS 887430-98-0)
- 3-Ethenyl-4-sulfo-L-phenylalanine (CAS 1213253-44-1)
- Itopride Impurity 25 (CAS CATO-C4X-137725)
- D-Ser39-Tirzepatide (CAS CATO-CPTD788679)
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