Letermovir impurity 124 CAS CATO-C4X-2915124
| CAS No. | CATO-C4X-2915124 |
| Molecular Formula | C23H23Cl2F4N3O3 |
| Molecular Weight | 536.35 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 124.
CATO supplies Letermovir impurity 124 (CAS CATO-C4X-2915124), a pharmacopoeial impurity reference standard (molecular formula C23H23Cl2F4N3O3, MW 536.35 g/mol) used for the identification and quantification of trace impurities in APIs.
Structurally, Letermovir impurity 124 (C23H23Cl2F4N3O3) contains a steroid core, an amide group, a hydroxyl group, an ether linkage, fluorine/chlorine substitution. The molecule exhibits a degree of unsaturation (DBE) of 11.0, corresponding to approximately 11 ring(s) or double-bond equivalent(s). With a molecular weight of 536.35 g/mol, it falls into the moderately-high-molecular-weight range. 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 124 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 | C23H23Cl2F4N3O3 |
| Molecular Weight | 536.35 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 | 3 |
Related Letermovir Standards
- Letermovir Impurity 39 (CAS CATO-C4X-291539)
- Letermovir Impurity 64 (CAS CATO-C4X-291564)
- Letermovir Impurity 30 (CAS CATO-C4X-291530)
- Letermovir impurity 140 (CAS CATO-C4X-2915140)
- Letermovir Impurity 31 (CAS CATO-C4X-291531)
- Letermovir Impurity 77 (CAS CATO-C4X-291577)
- Letermovir Impurity 37 (CAS CATO-C4X-291537)
- Letermovir Impurity 38 (CAS CATO-C4X-291538)
Recommended Standards
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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