2-(4-Chlorophenyl)-4-(pyren-1-ylmethylene)oxazol-5(4H)-one CAS 71977-20-3
| CAS No. | 71977-20-3 |
| Molecular Formula | C26H14ClNO2 |
| Molecular Weight | 407.85 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.
2-(4-Chlorophenyl)-4-(pyren-1-ylmethylene)oxazol-5(4H)-one (CAS 71977-20-3), molecular formula C26H14ClNO2 and molecular weight 407.85 g/mol, is a CATO reference standard with documented purity and traceability.
Based on its molecular formula C26H14ClNO2, 2-(4-Chlorophenyl)-4-(pyren-1-ylmethylene)oxazol-5(4H)-one contains a steroid core, an amide group, a hydroxyl group, an ether linkage, chlorine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 407.85 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
As a certified reference material (CRM), 2-(4-Chlorophenyl)-4-(pyren-1-ylmethylene)oxazol-5(4H)-one 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 | C26H14ClNO2 |
| Molecular Weight | 407.85 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor) |
| Purity | 97%+ |
| Storage | Store at room temperature, protect from light |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 20.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1977 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
Related Chlorophenyl Standards
- 2-(2-Chlorophenyl)-4-(pyren-1-ylmethylene)oxazol-5(4H)-one (CAS 71977-19-0)
- 2-(4-Chlorophenyl)-1-((3,5-dimethylbenzyl)oxy)-6-nitro-1H-benzo[d]imidazole (CAS 282523-32-4)
- 5-((4-Chlorophenyl)sulfonyl)-4-(4-fluorophenoxy)-N,N-dimethylpyrimidin-2-amine (CAS 478247-37-9)
- 4-[(E)-2-(2-Chlorophenyl)ethenyl]-8-(trifluoromethoxy)-2H,3H-thieno[3,2-c]quinoline (CAS 866133-25-7)
- N-{4-[(2-chlorophenyl)sulfanyl]phenyl}-3-(trifluoromethyl)benzamide (CAS 339105-54-3)
- 1-(4-Chlorophenyl)-N-(2-fluorobenzyl)-5-(pyridin-4-yl)-1H-1,2,3-triazole-4-carboxamide (CAS 1251672-01-1)
- (E)-{[2-(4-chlorophenyl)-7-methylimidazo[1,2-a]pyridin-3-yl]methylidene}amino 4-fluorobenzoate (CAS 478257-20-4)
- 2-(4-(4-Chlorophenyl)-1-oxophthalazin-2(1H)-yl)-N-(4-fluorophenyl)acetamide (CAS 684234-60-4)
Recommended Standards
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- 2-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)-5-chloro-3-methylbenzoic acid (CAS 2243507-71-1)
- Norfloxacin EP Impurity I (CAS CATO-C4X-14689)
- 2-((((9H-Fluoren-9-yl)methoxy)carbonyl)amino)-4-chloro-3-methylbenzoic acid (CAS 2243516-16-5)
- Anagrelide USP Related Compound A HCl (CAS 2512201-53-3)
- [1-(2-chlorobenzyl)-2-methyl-1H-indol-3-yl]methanol (CAS 92407-99-3)
- 4-((tert-Butoxycarbonyl)amino)-2-fluorobutanoic acid (CAS 2167670-48-4)
- 3-Chloroquinoxalin-6-amine (CAS 166402-16-0)
- 4,6-Dichloro-2-cyclopropyl-5-nitropyrimidine (CAS 75438-78-7)
- 1-Bromo-3-chloro-2-iodo-5-(trifluoromethyl)benzene (CAS 175205-55-7)
- 2-(2-Chloro-6-fluorophenyl)ethanimidamide hydrochloride (CAS 158351-86-1)
- 4-Chloro-3-oxo-2-(4-phenyl-1,3-thiazol-2-yl)butanenitrile (CAS 428512-62-3)
- 2-((2-Aminophenyl)thio)-N-(4-butylphenyl)acetamide (CAS 763137-77-5)
- Liraglutide Sodium Salt (CAS 204656-20-2（free base）)
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