【停用，见C4X-29156】Letermovir impurity 117 CAS 2758792-79-7
| CAS No. | 2758792-79-7 |
| Molecular Formula | C31H32F4N4O4 |
| Molecular Weight | 600.60 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
Owing to a nitrogen-containing heterocyclic scaffold, an amide group, a hydroxyl group, an ether linkage, fluorine substitution, 【停用，见C4X-29156】Letermovir impurity 117 is typically pale yellow to yellow amorphous powder. Its solid-state physicochemical attributes — including a molecular weight of 600.60 g/mol — guide the selection of appropriate sample preparation and analytical techniques. Halogen substitution (F/Cl/Br/I) produces a distinctive isotope pattern in mass spectrometry, a valuable aid for qualitative confirmation.
As a process- or degradation-related impurity, 【停用，见C4X-29156】Letermovir impurity 117 (CAS 2758792-79-7, C31H32F4N4O4) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
Recommended for quantitative analysis by HPLC, GC, LC-MS/MS, or GC-MS as an external calibration standard; it can also be used for spiked-recovery experiments, LOD/LOQ determination, and LC-MS/MS multiple-reaction-monitoring (MRM) calibration.
CATO manufactures 【停用，见C4X-29156】Letermovir impurity 117 under ISO 17034:2016 accreditation with dual CNAS and ANAB accreditation. Each batch is characterized by orthogonal methods and supplied with a full Certificate of Analysis (COA), ensuring metrological traceability.
Physical & Chemical Properties
| Molecular Formula | C31H32F4N4O4 |
| Molecular Weight | 600.60 g/mol |
| 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) | 16.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 2002 |
| Halogen Content | F-containing |
| Nitrogen Atoms | 4 |
Recommended Standards
- Osimertinib Impurity 97 (CAS CATO-C4X-204597)
- (R)-Letermovir Ethyl Ester (CAS CATO-C4X-291535)
- Osimertinib impurity 59 (CAS CATO-C4X-204559)
- Letermovir Impurity 41 (CAS CATO-C4X-291541)
- Rabeprazole Impurity 9 (CAS 1114543-47-3)
- Lafutidine Impurity 27 (CAS CATO-C4X-147627)
- Ibuprofen impurity 128 (CAS CATO-C4X-1082128)
- tert-Butyl N-(3-nitrophenyl)-N-propylcarbamate (CAS 1881332-39-3)
- Darolutamide impurity 8 (CAS CATO-C4X-31068)
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Why CATO?
- ISO 17034 accredited reference material producer (CNAS + ANAB dual accreditation)
- 130,000+ catalog items in stock, COA supplied with every batch
- Worldwide shipping with full export documentation (HS code guidance available)
- Technical support: +86 18665070610 / Nicole.chen@cato-chem.com