Letermovir Impurity 93 CAS CATO-C4X-291593
| CAS No. | CATO-C4X-291593 |
| Molecular Formula | C19H16F4N2O4 |
| Molecular Weight | 412.33 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 412.33 g/mol gives Letermovir Impurity 93 distinctive chromatographic separation conditions and mass-spectrometry parameter settings.
Letermovir Impurity 93 (CAS CATO-C4X-291593) is a certified pharmaceutical impurity reference standard with the molecular formula C19H16F4N2O4 and a molecular weight of 412.33 g/mol.
Letermovir Impurity 93 (C19H16F4N2O4) contains a flavonoid core, an amide group, a hydroxyl group, an ether linkage, fluorine 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. The presence of an aromatic ring or conjugated system gives the compound characteristic absorption bands in the UV-Vis region, making it well suited to UV or diode-array detection (DAD).
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 93 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 | C19H16F4N2O4 |
| Molecular Weight | 412.33 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-containing |
| Nitrogen Atoms | 2 |
Related Letermovir Standards
- 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)
- Letermovir Impurity 85 (CAS CATO-C4X-291585)
- Letermovir Impurity 90 (CAS CATO-C4X-291590)
- Letermovir Impurity 92 (CAS CATO-C4X-291592)
- Letermovir impurity 137 (CAS CATO-C4X-2915137)
Recommended Standards
- Trifludimoxazin (CAS 1258836-72-4)
- Ethyl 1-[4-(4-nitrophenyl)-1,3-thiazol-2-yl]-5-(trifluoromethyl)-1H-pyrazole-4-carboxylate (CAS 159885-64-0)
- 4-Bromo-N-tert-butyl-N-[(4-methoxyphenyl)methyl]benzene-1-sulfonamide (CAS 1881330-94-4)
- 2-((2,5-Dioxo-1-(4-(trifluoromethoxy)phenyl)pyrrolidin-3-yl)thio)nicotinic acid (CAS 280133-24-6)
- Triptolide Impurity 2 (CAS CATO-C4X-21862)
- Estriol Impurity 27 (CAS 7219-89-8)
- Decitabine Impurity 8 (CAS CATO-C4X-11378)
- Trihexadecyl(phenyl)silane (CAS 18822-36-1)
- 1-Methyl-3-(2,2,2-trifluoroethoxy)-1H-pyrazol-4-amine hydrochloride (CAS 1431962-31-0)
- 5-[(3-Nitro-1H-pyrazol-1-yl)methyl]-2-furoic acid (CAS 1006432-94-5)
- tert-Butyl 3-(((6-methylpyridazin-3-yl)oxy)methyl)piperidine-1-carboxylate (CAS 1261229-72-4)
- 2-Chloro-N-methoxy-N-methylthiazole-5-carboxamide (CAS 1234014-27-7)
- 4-Chloro-N-(5-chloro-2-formylphenyl)benzenesulfonamide (CAS 922711-94-2)
- Uremic Pentapeptide (CAS 71494-20-7)
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