Remdesivir Impurity 33 CAS 1355049-92-1
| CAS No. | 1355049-92-1 |
| Molecular Formula | C15H23ClNO4P |
| Molecular Weight | 347.77 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
This reference standard supports related-substances testing and method development in line with ICH Q3A/Q3B guidance on impurity control, and is suitable for system suitability testing and forced-degradation studies.
Remdesivir Impurity 33 (CAS 1355049-92-1) is a certified pharmaceutical impurity reference standard with the molecular formula C15H23ClNO4P and a molecular weight of 347.77 g/mol.
Based on its molecular formula C15H23ClNO4P, Remdesivir Impurity 33 contains a nitrogen-containing heterocyclic scaffold, an amide group, a phosphate ester group, a hydroxyl group, an ether linkage, chlorine substitution; these features give the compound characteristic absorption bands in UV spectroscopy. The molecular weight of 347.77 g/mol is directly relevant to the identification of the molecular ion in mass spectrometry. 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).
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 | C15H23ClNO4P |
| Molecular Weight | 347.77 g/mol |
| Appearance | Off-white to pale yellow crystalline powder. (slight halide-like odor) |
| Purity | 97%+ |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, acetonitrile, DMSO, water (slightly soluble) |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Contains ester bond; hydrolyzes under strong alkaline conditions |
| Degree of Unsaturation (DBE) | 4.5 |
| UV Absorption | UV-absorbing |
| Structural Features | Aromatic ring present |
| CAS Registry Year (est.) | 1991 |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
Related Remdesivir Standards
- Remdesivir Impurity 9 (CAS 1191237-80-5)
- Remdesivir Impurity 24 (CAS CATO-C4X-210024)
- Remdesivir Impurity 25 (CAS CATO-C4X-210025)
- Remdesivir Impurity 37 (CAS CATO-C4X-210037)
- Remdesivir Impurity 20 (CAS CATO-C4X-210020)
- Remdesivir Impurity 39 (CAS 793-12-4)
- Remdesivir Impurity 19 (CAS 1355049-95-4)
- Remdesivir Impurity 5 (CAS 1191237-69-0)
Recommended Standards
- Ethyl (2E)-2-[(carbamoylamino)imino]-3-(4-chlorobenzenesulfonyl)propanoate (CAS 861211-81-6)
- 1-(2-Chlorophenyl)-5-((pyrimidin-2-ylthio)methyl)-1H-1,2,3-triazole-4-carboxylic acid (CAS 1416341-59-7)
- 2,4,6-Tris(2-ethoxyethoxy)-1,3,5,2,4,6-trioxatriborinane (CAS 64583-01-3)
- 1-(4-Chlorophenyl)-5-((pyrimidin-2-ylthio)methyl)-1H-1,2,3-triazole-4-carboxylic acid (CAS 1416346-96-7)
- Melphalan Impurity 37 (CAS CATO-C4X-198837)
- Azacitidine Impurity 56 (CAS 154568-81-7)
- Testosterone EP Impurity B (CAS 972-46-3)
- 4-Amino-n-[(4-chlorophenyl)methyl]benzene-1-sulfonamide (CAS 928001-88-1)
- 4H,5H,6H-pyrrolo[1,2-b]pyrazol-3-ylmethanol (CAS 1909305-08-3)
- 2-[4-(carbamoylamino)phenyl]acetic acid (CAS 69100-53-4)
- BTZ2F89-2Br (CAS 1616860-69-5)
- Propranolol Impurity 34 (CAS CATO-C4X-151934)
- Tert-butyl (3-methylpiperidin-4-yl)carbamate (CAS 866538-96-7)
- Calcitonin C-Terminal Flanking Peptide (human) XTFA (CAS 85916-47-8（free base）)
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