Aprepitant impurity 56 CAS CATO-C4X-114156
| CAS No. | CATO-C4X-114156 |
| Molecular Formula | C27H22F7NO2 |
| Molecular Weight | 525.46 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Compared with other compounds in its class, the molecular weight of 525.46 g/mol gives Aprepitant impurity 56 distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
As a process- or degradation-related impurity, Aprepitant impurity 56 (CAS CATO-C4X-114156, C27H22F7NO2) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
Owing to a steroid core, an amide group, a hydroxyl group, an ether linkage, fluorine substitution, Aprepitant impurity 56 is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 525.46 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
This reference standard supports related-substances testing and method development in line with ICH Q3A/Q3B guidance on impurity control, and is suitable for system suitability testing and forced-degradation studies.
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
Physical & Chemical Properties
| Molecular Formula | C27H22F7NO2 |
| Molecular Weight | 525.46 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor, low volatility) |
| 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) | 14.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Halogen Content | F-containing |
| Nitrogen Atoms | 1 |
Related Aprepitant Standards
- Aprepitant Impurity 44 (CAS CATO-C4X-114144)
- Aprepitant Impurity 13 (CAS 183664-56-4)
- Aprepitant impurity 29 (CAS CATO-C4X-237929)
- Aprepitant (CAS 170729-80-3)
- Aprepitant USP Related Compound A (CAS 1148113-53-4)
- Aprepitant Impurity 2 (CAS 1185502-97-9)
- Aprepitant Impurity 3 (CAS 172822-28-5)
- Aprepitant Impurity 4 (CAS 172822-29-6)
Recommended Standards
- Aztreonam Impurity 93 (CAS CATO-C4X-152293)
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- 5-(((4-Fluorophenyl)amino)methyl)-1,3,4-oxadiazole-2(3H)-thione (CAS 436095-85-1)
- 3-((3-Bromobenzyl)thio)-4-ethyl-5-(furan-2-yl)-4H-1,2,4-triazole (CAS 618413-69-7)
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- (+)-3-Carboxy-2,2,5,5-tetramethylpyrrolidinyl-1-oxy (CAS 50525-83-2)
- Benzyl 4-amino-3,3-difluoropiperidine-1-carboxylate (CAS 1255667-38-9)
- Des-Leu14-Tirzepatide (CAS CATO-CPTD788959)
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