Letermovir Impurity 94 CAS CATO-C4X-291594
| CAS No. | CATO-C4X-291594 |
| Molecular Formula | C23H24F4N4O3 |
| Molecular Weight | N/A |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Letermovir Impurity 94 (C23H24F4N4O3HCl) contains a steroid core, an amide group, a hydroxyl group, an ether linkage, fluorine/chlorine substitution. It is notably hygroscopic, halogen substitution raises its density and boiling point, the carboxyl group imparts weak acidity; these physicochemical properties determine the optimal preparation and storage of its standard solutions. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
Letermovir Impurity 94 (CAS CATO-C4X-291594) is a certified pharmaceutical impurity reference standard with the molecular formula C23H24F4N4O3HCl and a molecular weight of 516.92 g/mol.
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), Letermovir Impurity 94 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 | C23H24F4N4O3 HCl |
| Molecular Weight | 516.92 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) | 11.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Halogen Content | F/Cl-containing |
| Nitrogen Atoms | 4 |
Related Letermovir Standards
- Letermovir Impurity 4 (CAS 1791412-07-1)
- Letermovir impurity 118 (CAS 2758792-75-3)
- Letermovir impurity 119 (CAS 2864441-61-0)
- Letermovir Isopropyl Ester (CAS 2872586-94-0（free base）)
- Letermovir Impurity 54 (CAS 2991059-70-0)
- Letermovir Impurity 27 (CAS 2991059-71-1)
- Letermovir Impurity 28 (CAS 2991299-71-7)
- Letermovir Impurity 32 (CAS 2994645-03-1)
Recommended Standards
- Aceclofenac Impurity 16 (CAS CATO-C4X-153116)
- Doxofylline Impurity 11 (CAS CATO-C4X-151311)
- Vitamin K1 Impurity 49 (CAS 3689-69-8)
- 1-tert-Butyl 3-ethyl (3r,4s)-4-aminopyrrolidine-1,3-dicarboxylate hydrochloride (CAS 1262849-90-0)
- 3-Amino-4,N,N-trimethyl-benzenesulfonamide (CAS 6331-68-6)
- 3-Amino-2-(4-chlorobenzyl)propanoic Acid (CAS 791615-75-3)
- (R)-3-Hydroxydodecanoic acid (CAS 28254-78-6)
- 2-Propenamide, N-[3-(dimethylamino)-2,2-dimethylpropyl]-2-methyl-, sulfate, polymer with 2-propenamide (CAS 75150-25-3)
- 8-methoxy-4-methyl-1,2,3,4-tetrahydroquinoline (CAS 89445-81-8)
- Semaglutide impurity 34 (CAS CATO-C4X-222634)
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