Ensitrelvir Impurity 7 CAS CATO-C4X-25197
| CAS No. | CATO-C4X-25197 |
| Molecular Formula | C18H12ClF3N6O2 |
| Molecular Weight | 436.78 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Under current pharmacopoeial and regulatory frameworks, quality-control requirements for this class of reference material explicitly involve the control of targets including Ensitrelvir Impurity 7.
Ensitrelvir Impurity 7 (CAS CATO-C4X-25197) is a certified pharmaceutical impurity reference standard with the molecular formula C18H12ClF3N6O2 and a molecular weight of 436.78 g/mol.
Owing to a steroid core, an amide group, a hydroxyl group, an ether linkage, fluorine/chlorine substitution, Ensitrelvir Impurity 7 is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 436.78 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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.
As a certified reference material (CRM), Ensitrelvir Impurity 7 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 | C18H12ClF3N6O2 |
| Molecular Weight | 436.78 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor, low volatility) |
| Purity | 97%+ |
| Storage | Store in a cool place (≤25°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; 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/Cl-containing |
| Nitrogen Atoms | 6 |
Related Ensitrelvir Standards
Recommended Standards
- tert-Butyl 4-(5-chloro-2-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzyl)piperazine-1-carboxylate (CAS 2096341-22-7)
- 5-(4-Chlorophenyl)-3-(1,3-dioxo-2,3-dihydro-1H-inden-2-ylidene)-4,6-dioxo-octahydropyrrolo[3,4-c]pyrrole-1-carboxylic acid (CAS 321392-14-7)
- tert-Butyl 4-(4-chloro-3-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)benzyl)piperazine-1-carboxylate (CAS 2096334-64-2)
- Isopropyl 2-amino-4-(3-chloro-4-nitrophenyl)-6-(hydroxymethyl)-8-oxo-4,8-dihydropyrano[3,2-b]pyran-3-carboxylate (CAS 939894-04-9)
- Crisaborole lmpurity 84 (CAS CATO-C4X-202184)
- Palbociclib Impurity 170 (CAS CATO-C4X-1125170)
- Difenidol Impurity 9 DiHCl (CAS 88826-31-7)
- 4-chloro-1-[(1,1-dimethylethyl)dimethylsilyl]-1H-Pyrrolo[2,3-b]pyridine (CAS 937796-62-8)
- 4-(3-Fluoro-4-methylphenyl)aniline (CAS 1355247-93-6)
- 4-(Tetrahydrofuran-2-yl)butyl decanoate (CAS 5453-16-7)
- Methyl 4-(4-chlorophenyl)-2-hydroxybenzoate (CAS 1820716-98-0)
- Secoxyloganin methyl ester (CAS 74713-15-8)
- N-(3,5-Difluorophenyl)acetamide (CAS 404-01-3)
- (D-Tyr1,N-Me-Phe3)-Neuropeptide FF (H-4752.0001) (CAS 145274-93-7)
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