5-Hydroxy-3-phenylisoxazole CAS 23253-51-2
| CAS No. | 23253-51-2 |
| Molecular Formula | C9H7NO2 |
| Molecular Weight | 161.16 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
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.
CATO supplies 5-Hydroxy-3-phenylisoxazole (CAS 23253-51-2), a certified reference material (molecular formula C9H7NO2, MW 161.16 g/mol) for analytical method development and quality control.
Based on its molecular formula C9H7NO2, 5-Hydroxy-3-phenylisoxazole contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 161.16 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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).
As a certified reference material (CRM), 5-Hydroxy-3-phenylisoxazole 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 | C9H7NO2 |
| Molecular Weight | 161.16 g/mol |
| Appearance | Off-white to pale 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) | 7.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1963 |
| Nitrogen Atoms | 1 |
Related Hydroxy Standards
- 7-Hydroxy-1h-indole-3-carbaldehyde (CAS 148563-38-6)
- 3-Hydroxy-1H-indole-2-carbaldehyde (CAS 172984-51-9)
- 4-Hydroxy-1H-indole-5-carbaldehyde (CAS 1781840-96-7)
- 6-Hydroxy-1H-indole-3-carbaldehyde (CAS 192184-71-7)
- 5-Hydroxy-1H-indole-4-carbaldehyde (CAS 19502-27-3)
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Recommended Standards
- 5-Hydroxy-1H-indole-3-carbaldehyde (CAS 3414-19-5)
- 5-Hydroxybenzofuran-4-carbimidic acid (CAS 64758-65-2)
- 5H-[1,3]Dioxolo[4,5-f]indole (CAS 267-48-1)
- 5-Isocyanato-2,3-dihydrobenzofuran (CAS 215162-92-8)
- Methyl 2-(2-(3-formyl-1H-indol-1-yl)acetamido)benzoate (CAS 592546-80-0)
- (2-Methyl-2-propanethiolato)(triphenylphosphine)gold (CAS 122711-31-3)
- Ethyl 2-(4-Methyl-3-indolyl)-2-oxoacetate (CAS 926028-97-9)
- N-(5-Oxo-1-phenylpyrrolidin-3-yl)benzenesulfonamide (CAS 905683-17-2)
- 2,3,6-Trichlorophenyl-4'-nitrophenyl ether (CAS 142022-58-0)
- N-[4-(3-Nitrophenyl)-2-thiazolyl]acetamide (CAS 53173-92-5)
- 3-(((4-Isopropylphenyl)sulfonyl)methyl)-5-(trifluoromethyl)-1,2,4-oxadiazole (CAS 1020252-61-2)
- tert-Butyl methyl ether (CAS 1634-04-4)
- Tert-butyl 3-amino-4-methylbenzoate (CAS 111773-25-2)
- Tirzepatide Impurity 48 (CAS CATO-C4X-324048)
Why CATO?
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