3-Methyl-5-(2-nitrophenyl)-1,2,4-oxadiazole CAS 76629-46-4
| CAS No. | 76629-46-4 |
| Molecular Formula | C9H7N3O3 |
| Molecular Weight | 205.17 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
3-Methyl-5-(2-nitrophenyl)-1,2,4-oxadiazole (CAS 76629-46-4), molecular formula C9H7N3O3 and molecular weight 205.17 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C9H7N3O3, 3-Methyl-5-(2-nitrophenyl)-1,2,4-oxadiazole 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 205.17 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).
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), 3-Methyl-5-(2-nitrophenyl)-1,2,4-oxadiazole 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 | C9H7N3O3 |
| Molecular Weight | 205.17 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (faint amine-like odor) |
| Purity | 97%+ |
| 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) | 8.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1978 |
| Nitrogen Atoms | 3 |
Related Methyl Standards
- 2-(2-Methyl-3-nitrophenyl)-1,3,4-oxadiazole (CAS 1092345-76-0)
- 2-(3-methyl-4-nitrophenyl)-1,3,4-oxadiazole (CAS 1118786-96-1)
- 5-(2-Methyl-5-nitrophenyl)-2H-tetrazole (CAS 1203801-06-2)
- 4-(2-Nitrophenyl)oxazol-2-amine (CAS 1248008-00-5)
- 5-[(4-nitrophenyl)methyl]-1H-1,2,3,4-tetrazole (CAS 131090-44-3)
- 5-(4-Nitrophenyl)oxazol-2-amine (CAS 13576-56-2)
- 3-Methyl-5-(4-nitrophenyl)-1,2,4-oxadiazole (CAS 1455-82-9)
- 5-(3-Nitrophenyl)isoxazol-3-amine (CAS 1463481-61-9)
Recommended Standards
- 3-Hydroxy-2-oxo-1,2-dihydroquinoline-4-carboxylic acid (CAS 91587-89-2)
- 3-Methyl-5-(3-nitrophenyl)-1,2,4-oxadiazole (CAS 76629-45-3)
- 3-[(1H-1,2,3,4-tetrazol-5-yl)amino]benzoic acid (CAS 199535-07-4)
- 3-Methyl-6-nitro-2H-chromen-2-one (CAS 95532-74-4)
- 4-(4-Methoxy-3-methylphenyl)butanoic acid (CAS 33446-15-0)
- 3-(3-Chlorophenyl)morpholine (CAS 1017396-60-9)
- 2,5-Dicyanoterephthalic acid (CAS 46696-24-6)
- 1,2,3,4,5-pentafluoro-6-(trichloromethyl)benzene 1,2,3,4,5-pentakis(fluoranyl)-6-(trichloromethyl)benzene 778-34-7 A839211 (CAS 778-34-7)
- Taurohyocholic acid (CAS 32747-07-2)
- (5-Cyclopropoxy-4-isopropylpyridin-3-yl)methanamine (CAS 1243324-42-6)
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- 1-(4-Methoxyphenyl)-2,4-dioxo-1,2,3,4-tetrahydropyrimidine-5-carbonitrile (CAS 75837-81-9)
- (S)- 2-Methylaziridine-1-carboxylic acid tert-butyl ester, 97% (CAS 197020-60-3)
- Steroidogenesis-Activator Polypeptide (rat) (H-8855.0500) (CAS 108563-23-1)
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