2-(4-Nitrophenyl)benzo[d]oxazole CAS 840-58-4
Purity 97%+In StockPharmaceutical Standards
| CAS No. | 840-58-4 |
| Molecular Formula | C13H8N2O3 |
| Molecular Weight | 240.21 g/mol |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
2-(4-Nitrophenyl)benzo[d]oxazole (CAS 840-58-4) reference standard, produced by CATO (ISO 17034 / CNAS / ANAB accredited). Molecular formula: C13H8N2O3. Molecular weight: 240.21 g/mol. Trusted by 10,000+ laboratories worldwide for pharmaceutical analysis and QC.
Physical & Chemical Properties
| Molecular Formula | C13H8N2O3 |
| Molecular Weight | 240.21 g/mol |
| Appearance | Pale yellow to yellow crystalline powder |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in DMSO, DMF, methanol |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1957 |
| Nitrogen Atoms | 2 |
Related Nitrophenyl Standards
- 2-(3-Nitrophenyl)benzo[d]oxazole (CAS 840-56-2)
- 2-(3-Nitrophenyl)imidazo[1,2-a]pyrimidine (CAS 134044-50-1)
- 4-(3-Nitrophenyl)-1H-pyrrolo[2,3-d]pyrimidine (CAS 1443237-65-7)
- 1-(4-Nitrophenyl)-1H-benzo[d][1,2,3]triazole (CAS 4490-51-1)
- 2-(2-Nitrophenyl)-3H-imidazo[4,5-c]pyridine (CAS 75007-80-6)
- 2-(4-Nitrophenyl)-3H-imidazo[4,5-c]pyridine (CAS 75007-81-7)
- 2-(4-Nitrophenyl)imidazo[1,2-a]pyrimidine (CAS 28266-96-8)
- 7-(3-Nitrophenyl)pyrazolo[1,5-a]pyrimidine (CAS 832740-68-8)
Recommended Standards
- 2-(Carboxymethyl)-4,5-dimethoxybenzoic acid, >96% (CAS 3809-00-5)
- 11-Oxo-11H-pyrido[2,1-b]quinazoline-8-carboxylic acid (CAS 63094-28-0)
- 2-(Carboxymethyl)-4,6-dimethoxybenzoic acid (CAS 4778-99-8)
- 2,6-Dimethyl-4-phenylpyridine-3,5-dicarboxylic acid (CAS 4446-60-0)
- 5,6,7,8-Tetrahydro-5,8-methanoisoquinoline (CAS 105275-30-7)
- (2,4-Difluorophenyl)(5-methylpyridin-2-yl)methanone (CAS 1187170-63-3)
- Rosuvastatin Impurity 171 (CAS CATO-C4X-1169171)
- (5-(3-Iodopropoxy)-2-nitrophenyl)methanol (CAS 185994-27-8)
- Ethyl 2-(benzylimino)-2,3-dihydrothiazole-4-carboxylate (CAS 126534-13-2)
- Endo-Gly4-Semaglutide (CAS CATO-C4X-222679)
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