Letermovir Ethyl Ester Di-p-toluoyl-D-tartaric acid salt CAS CATO-C4X-291546
| CAS No. | CATO-C4X-291546 |
| Molecular Formula | C31H32F4N4O4 |
| Molecular Weight | N/A |
| Category | Pharmaceutical Standards / API Standards |
| Availability | In Stock |
Chemical Structure
Description
Based on its molecular formula C31H32F4N4O4C20H18O8, Letermovir Ethyl Ester Di-p-toluoyl-D-tartaric acid salt contains a nitrogen-containing heterocyclic scaffold, 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 986.97 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. The aromatic system may exhibit native fluorescence, enabling detection with a fluorescence detector (FLD).
Letermovir Ethyl Ester Di-p-toluoyl-D-tartaric acid salt (CAS CATO-C4X-291546), molecular formula C31H32F4N4O4C20H18O8 and molecular weight 986.97 g/mol, is a CATO reference standard with documented purity and traceability.
This reference standard is suitable for quantitative analysis on major chromatographic platforms including HPLC, GC, LC-MS/MS, and GC-MS, serving as an external calibration standard or a system suitability test reference material.
The assigned purity is verified by mass-balance and quantitative NMR (qNMR) approaches, with the expanded uncertainty reported at a 95% confidence level (k=2). Batch homogeneity and stability are independently assessed for every lot.
Physical & Chemical Properties
| Molecular Formula | C31H32F4N4O4 C20H18O8 |
| Molecular Weight | 986.97 g/mol |
| 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) | 27.0 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| Halogen Content | F-containing |
| Nitrogen Atoms | 4 |
Related Letermovir Standards
- Letermovir Impurity 4 (CAS 1791412-07-1)
- Letermovir impurity 118 (CAS 2758792-75-3)
- Letermovir impurity 119 (CAS 2864441-61-0)
- Letermovir Isopropyl Ester (CAS 2872586-94-0（free base）)
- Letermovir Impurity 54 (CAS 2991059-70-0)
- Letermovir Impurity 27 (CAS 2991059-71-1)
- Letermovir Impurity 28 (CAS 2991299-71-7)
- Letermovir Impurity 32 (CAS 2994645-03-1)
Recommended Standards
- 2,3-Difluoroisonicotinonitrile (CAS 1210041-67-0)
- Methyl 3,4-dimethyl-2-thioxo-2,3-dihydrothiazole-5-carboxylate (CAS 473827-75-7)
- 3-Methyl-5-nitrobenzoic Acid (CAS 113882-33-0)
- 3-(3-Chlorophenoxy)pyrrolidine hydrochloride (CAS 28491-00-1)
- 2-Methylquinoline-4,7-diol (CAS 90924-19-9)
- 4-((Allyloxy)methyl)benzonitrile (CAS 77180-31-5)
- 5-Phenyl-1H-pyrazol-4-amine (CAS 91857-86-2)
- 2-Chloro-5-methoxyquinoxaline (CAS 76052-76-1)
- 3-(2-Benzyl-4-(difluoromethyl)-6-oxo-2,6-dihydro-7H-pyrazolo[3,4-b]pyridin-7-yl)propanoic acid (CAS 1018127-17-7)
- Neuropeptide FF (CAS 99566-27-5)
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