Letermovir Impurity 19 CAS CATO-C4X-291519
| CAS No. | CATO-C4X-291519 |
| Molecular Formula | C29H28F4N4O4 |
| Molecular Weight | 572.55 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 572.55 g/mol gives Letermovir Impurity 19 distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
As a process- or degradation-related impurity, Letermovir Impurity 19 (CAS CATO-C4X-291519, C29H28F4N4O4) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
Based on its molecular formula C29H28F4N4O4, Letermovir Impurity 19 contains a steroid core, an amide group, a hydroxyl group, an ether linkage, fluorine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 572.55 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. Nitrogen-containing functional groups confer excellent ionization efficiency in positive-ion electrospray (ESI) mode, making the compound well suited to LC-MS/MS analysis.
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 Letermovir Impurity 19 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 | C29H28F4N4O4 |
| Molecular Weight | 572.55 g/mol |
| Appearance | Pale yellow to yellow crystalline powder. (slight halide-like odor, low volatility) |
| Purity | >95% |
| 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 |
| Halogen Content | F-containing |
| Nitrogen Atoms | 4 |
Related Letermovir Standards
- rac-Letermovir, >98% (CAS 791116-51-3)
- Letermovir (CAS 917389-32-3)
- Letermovir Impurity 10 (CAS CATO-C4X-291510)
- Letermovir Impurity 103 (CAS CATO-C4X-2915103)
- Letermovir Impurity 42 (CAS CATO-C4X-291542)
- Letermovir Impurity 44 (CAS CATO-C4X-291544)
- Letermovir Impurity 47 (CAS CATO-C4X-291547)
- ent-Letermovir (CAS 917389-37-8)
Recommended Standards
- Posaconazole Impurity 96 (CAS 2256739-22-5)
- Posaconazole impurity 234 (CAS CATO-C4X-1208234)
- Letermovir Impurity 63 (CAS CATO-C4X-291563)
- Letermovir Impurity 67 (CAS CATO-C4X-291567)
- Lapatinib Impurity 26 (CAS CATO-C4X-119126)
- Zolmitriptan EP Impurity G-d3 (CAS 1217623-11-4)
- Canagliflozin Impurity 40 (CAS 1030825-20-7)
- 3-Methylbenzo[b]thiophene-2-carboxylic acid (CAS 3133-78-6)
- (R)-3-Amino-1-methylpyrrolidin-2-one (CAS 782446-70-2)
- 2-(4-Methyl-1h-pyrazol-1-yl)propan-1-amine (CAS 1170137-51-5)
- (R)-2,2-dimethyl-3-(3-oxohexahydroimidazo[1,5-a]pyrazin-2(3H)-yl)propanoic acid (CAS 2306252-87-7)
- (R)-tert-Butyl 2-((1,3-dioxoisoindolin-2-yl)oxy)propanoate (CAS 380886-36-2)
- N-methoxy-N-methyl-2-(trifluoromethyl)benzamide (CAS 116332-63-9)
- Des-Ile12-Aib13-Tirzepatide (CAS CATO-CPTD788960)
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