Benzofuro[4,5-d]oxazole CAS 50511-87-0
| CAS No. | 50511-87-0 |
| Molecular Formula | C9H5NO2 |
| Molecular Weight | 159.14 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Benzofuro[4,5-d]oxazole (CAS 50511-87-0), molecular formula C9H5NO2 and molecular weight 159.14 g/mol, is a CATO reference standard with documented purity and traceability.
The molecular framework of Benzofuro[4,5-d]oxazole (C9H5NO2) is characterized by an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. 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).
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), Benzofuro[4,5-d]oxazole 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 | C9H5NO2 |
| Molecular Weight | 159.14 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (faint amine-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light |
| Degree of Unsaturation (DBE) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1971 |
| Nitrogen Atoms | 1 |
Related Benzofuro Standards
- Benzofuro[5,4-d]oxazole (CAS 115422-75-8)
- Benzofuro[6,5-d]isoxazole (CAS 153965-77-6)
- 2H-Benzofuro[2,3-d][1,2,3]triazole (CAS 33080-67-0)
- 2H-Benzofuro[4,5-d][1,2,3]triazole (CAS 210-91-3)
- Benzofuro[4,5-c]isoxazole (CAS 64399-46-8)
- Benzofuro[5,6-d]isoxazole (CAS 267-57-2)
- Benzofuro[5,6-d]oxazole (CAS 25885-38-5)
- Benzofuro[6,5-d]oxazole (CAS 20419-35-6)
Recommended Standards
- 7-Hydroxybenzofuran-5-carbonitrile (CAS 2090472-33-4)
- 7-Hydroxybenzofuran-4-carbonitrile (CAS 94019-86-0)
- 7-Hydroxybenzofuran-2-carbonitrile (CAS 53020-47-6)
- Benzofuro[6,7-d]isoxazole (CAS 211-48-3)
- N-(3-aminopropyl)adamantane-1-carboxamide (CAS 408324-84-5)
- Leu-Ser-Lys-Leu-NH2 (CAS 283609-79-0)
- 2-[4-(2,4-Dichlorophenyl)-1,3-thiazol-2-yl]acetonitrile (CAS 730951-49-2)
- 9-(Tert-butyl)-1-oxa-4-azaspiro[5.5]undecane (CAS 1247899-24-6)
- 5-Hydroxy-4'-methoxy-1,6-dihydro-[1,1'-biphenyl]-3(2H)-one (CAS 111945-85-8)
- Tert-butyl 4-(3-amino-2-methylpropanoyl)piperazine-1-carboxylate (CAS 1303889-86-2)
- 1-Methyl-3-(methylamino)-1H-pyrazole-5-carbonitrile (CAS 1956318-03-8)
- Phosphoramidite Impurity 29 (CAS 102987-83-7)
- Methyl 4-sulfamoylbenzoate (CAS 22808-73-7)
- [Formaldehyde Schiff-base]-Semaglutide Impurity 136 X TFA Salt (CAS CATO-C4X-2226136)
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