Benzofuro[5,6-d]isoxazole CAS 267-57-2
| CAS No. | 267-57-2 |
| Molecular Formula | C9H5NO2 |
| Molecular Weight | 159.14 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 Benzofuro[5,6-d]isoxazole.
Benzofuro[5,6-d]isoxazole (CAS 267-57-2), molecular formula C9H5NO2 and molecular weight 159.14 g/mol, is a CATO reference standard with documented purity and traceability.
Benzofuro[5,6-d]isoxazole (C9H5NO2) contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage. 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.
As a certified reference material (CRM), Benzofuro[5,6-d]isoxazole 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.) | 1957 |
| 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[4,5-d]oxazole (CAS 50511-87-0)
- 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)
- Benzofuro[6,7-d]isoxazole (CAS 211-48-3)
- 7-Hydroxybenzofuran-4-carbonitrile (CAS 94019-86-0)
- Benzofuro[6,7-d]oxazole (CAS 25885-39-6)
- 2-Chloro-4-(1-naphthyl)-6-phenyl-1,3,5-triazine (CAS 1472062-95-5)
- (3AR,4S,9bS)-4-(4-fluorophenyl)-3a,4,5,9b-tetrahydro-3H-cyclopenta[c]quinolin-8-amine (CAS 1391456-67-9)
- 2-(4-Fluorophenyl)-3-hydroxy-1,5,6,7-tetrahydro-4H-indol-4-one (CAS 890094-34-5)
- 1-(2-Methylimidazo[1,2-a]pyridin-5-yl)ethan-1-one (CAS 1042981-21-4)
- (S)-2-((1-Benzylpyrrolidin-3-yl)(isopropyl)amino)ethanol (CAS 1354001-66-3)
- 4-({8-methylimidazo[1,2-a]pyridin-2-yl}methoxy)benzoic acid (CAS 929974-89-0)
- 4-Isopropyl-4-methylcyclohexan-1-amine (CAS 2092631-80-4)
- 2-(Methyl(3-nitrophenyl)amino)acetic acid (CAS 942232-50-0)
- H-D-Orn(Boc,Me)-OH (CAS 2350038-80-9)
- Adrenal Peptide E, bovine (CAS 78355-50-7)
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