Letermovir Impurity 3 CAS CATO-C4X-29153
| CAS No. | CATO-C4X-29153 |
| Molecular Formula | C21H18F2N2O5 |
| Molecular Weight | 416.37 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 Letermovir Impurity 3.
Letermovir Impurity 3 (CAS CATO-C4X-29153) is a certified pharmaceutical impurity reference standard with the molecular formula C21H18F2N2O5 and a molecular weight of 416.37 g/mol.
Owing to a flavonoid core, an amide group, a hydroxyl group, an ether linkage, fluorine substitution, Letermovir Impurity 3 is typically pale yellow to yellow crystalline powder. Its solid-state physicochemical attributes — including a molecular weight of 416.37 g/mol — guide the selection of appropriate sample preparation and analytical techniques. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
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 3 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 | C21H18F2N2O5 |
| Molecular Weight | 416.37 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) | 13.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Halogen Content | F-containing |
| Nitrogen Atoms | 2 |
Related Letermovir Standards
- Letermovir impurity 122 (CAS CATO-C4X-2915122)
- Letermovir impound 123 (CAS CATO-C4X-2915123)
- Letermovir impurity 137 (CAS CATO-C4X-2915137)
- Letermovir Impurity 58 (CAS CATO-C4X-291558)
- Letermovir Impurity 132 (CAS CATO-C4X-2915132)
- Letermovir Impurity 71 (CAS CATO-C4X-291571)
- Letermovir Impurity 75 (CAS CATO-C4X-291575)
- Letermovir Impurity 83 (CAS CATO-C4X-291583)
Recommended Standards
- Regaloside C (CAS 117591-85-2)
- Resorufin N-acetyl-b-D-glucosamine (CAS 124762-32-9)
- N-(4-(2-Oxo-2H-chromen-3-yl)thiazol-2-yl)-3-(trifluoromethyl)benzamide (CAS 329903-19-7)
- Darusentan 13C6 (CAS 1261365-22-3)
- Acalabrutinib Impurity 20 (CAS CATO-C4X-305520)
- Moxifloxacin Impurity N41 (CAS 172602-81-2)
- Mosapride Impurity 23 (CAS CATO-C4X-104423)
- 3-(4-Bromobenzyl)pyrrolidin-3-ol (CAS 1339088-21-9)
- Iopromide Impurity 26 (CAS CATO-C4X-183226)
- 2,2,2-trifluoroethyl N-(5-methylpyridin-3-yl)carbamate (CAS 1695226-01-7)
- n-[4-(2-chloroacetyl)-2-(methylsulfanyl)phenyl]acetamide (CAS 1146290-42-7)
- (1-isopropylcyclopropyl)methanol (CAS 1502415-85-1)
- 6-Bromopyridine-2(1H)-thione (CAS 856013-03-1)
- Insulin Degludec Impurity 3 (CAS CATO-C4X-21573)
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