Letermovir Impurity N19 CAS 791117-40-3
| CAS No. | 791117-40-3 |
| Molecular Formula | C30H30F4N4O4 |
| Molecular Weight | 586.58 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
CATO manufactures Letermovir Impurity N19 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.
CATO supplies Letermovir Impurity N19 (CAS 791117-40-3), a pharmacopoeial impurity reference standard (molecular formula C30H30F4N4O4, MW 586.58 g/mol) used for the identification and quantification of trace impurities in APIs.
The molecular framework of Letermovir Impurity N19 (C30H30F4N4O4) is characterized by a steroid core, an amide group, a hydroxyl group, an ether linkage, fluorine substitution. In reversed-phase chromatography, its retention is governed primarily by the protonation state of its nitrogen-containing groups, which provides a practical basis for HPLC-UV/DAD or LC-MS method development. 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.
Physical & Chemical Properties
| Molecular Formula | C30H30F4N4O4 |
| Molecular Weight | 586.58 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 |
| CAS Registry Year (est.) | 1986 |
| Halogen Content | F-containing |
| Nitrogen Atoms | 4 |
Related Letermovir Standards
- Letermovir Impurity 1 (CAS 917389-29-8)
- Letermovir Impurity 100 (CAS CATO-C4X-2915100)
- Letermovir impurity 136 (CAS CATO-C4X-2915136)
- Letermovir Impurity 59 (CAS CATO-C4X-291559)
- Letermovir Impurity 87 (CAS CATO-C4X-291587)
- Letermovir Impurity 96 (CAS CATO-C4X-291596)
- Letermovir impurity 57 (CAS CATO-C4X-291557)
- Letermovir impurity 128 (CAS CATO-C4X-2915128)
Recommended Standards
- Methyl (R)-2-(8-fluoro-3-(2-methoxy-5-(trifluoromethyl)phenyl)-2-(4-(3-methoxyphenyl)piperazin-1-yl)-3,4-dihydroquinazolin-4-yl)acetate (CAS 917389-34-5)
- N-((5-((2-(Benzo[d]thiazol-2-ylamino)-2-oxoethyl)thio)-4-(3-(trifluoromethyl)phenyl)-4H-1,2,4-triazol-3-yl)methyl)-2-fluorobenzamide (CAS 391899-60-8)
- (5R,6S)-6-[(1R)-1-Hydroxyethyl]-3-[[2-[[[(4-nitrophenyl)methoxy]carbonyl]amino]ethyl]thio]-7-oxo-1-azabicyclo[3.2.0]hept-2-ene-2-carboxylic Acid (4-Nitrophenyl)methyl Ester (CAS 64067-13-6)
- Ceftriaxone Impurity 25 (CAS CATO-C4X-116325)
- Tetracaine EP Impurity B-d9 (CAS 1309935-92-9)
- CAS 149709-61-5 (CAS 149709-61-5)
- Vilanterol Impurity 43 (CAS CATO-C4X-193543)
- 4-Bromo-3-thiophenecarbaldehyde (CAS 18791-78-1)
- 2-Hydroxybenzimidamide hydrochloride (CAS 501904-25-2)
- [9,9'-Bianthracene]-10-carbaldehyde (CAS 77802-21-2)
- 4-azepan-1-yl-1,1,1-trifluoro-3-(1-phenyl-1H-1,2,3,4-tetraazol-5-yl)but-3-en-2-one (CAS 152427-09-3)
- Ethyl 3-chloroimidazo[1,5-a]pyridine-1-carboxylate (CAS 885276-62-0)
- 2-Bromo-4-chloro-1-fluorobenzene (CAS 1996-30-1)
- HIV (gp120) Antigenic Peptide (H-2982.0500) (CAS 198636-94-1)
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