Oseltamivir Impurity 95 CAS CATO-C4X-172095
| CAS No. | CATO-C4X-172095 |
| Molecular Formula | C18H31NO3 |
| Molecular Weight | N/A |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
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.
As a process- or degradation-related impurity, Oseltamivir Impurity 95 (CAS CATO-C4X-172095, C18H31NO3HCl) is essential for impurity profiling, related-substances testing, and forced-degradation studies in pharmaceutical development.
Structurally, Oseltamivir Impurity 95 (C18H31NO3HCl) contains an amide group, a carboxylic acid group, a hydroxyl group, an ether linkage, chlorine substitution. The molecule exhibits a degree of unsaturation (DBE) of 3.0, corresponding to approximately 3 ring(s) or double-bond equivalent(s). With a molecular weight of 345.91 g/mol, it falls into the moderately-high-molecular-weight range. The high carbon-to-hydrogen ratio imparts good lipophilicity, allowing liquid-liquid extraction with non-polar solvents such as n-hexane or ethyl acetate.
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 | C18H31NO3 HCl |
| Molecular Weight | 345.91 g/mol |
| Appearance | White to pale yellow crystalline powder. (slight halide-like odor) |
| Purity | >95% |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in chloroform, dichloromethane, ethyl acetate, DMSO |
| 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) | 3.0 |
| UV Absorption | UV-absorbing |
| Halogen Content | Cl-containing |
| Nitrogen Atoms | 1 |
Related Oseltamivir Standards
- Oseltamivir Impurity 133 (CAS 10098-40-5)
- Oseltamivir impurity 265 Phosphate (CAS 1035895-88-5)
- Ent-Oseltamivir HCl (CAS 1035895-88-5(Free Base))
- Ent-Oseltamivir Phosphate (CAS 1035895-89-6)
- Oseltamivir Impurity N42 (CAS 1052063-36-1)
- Oseltamivir EP Impurity F HCl（Mixture of Diastereomers） (CAS 1052063-37-2（free base）)
- Oseltamivir-d3 (CAS 1093851-61-6)
- Oseltamivir Hydrochloride D3 (CAS 1093851-61-6(free base))
Recommended Standards
- Roxadustat Impurity 140 (CAS CATO-C4X-2213140)
- Lorazepam Impurity 12 (CAS 837-58-1)
- Lemborexant Impurity 27 (CAS CATO-C4X-304227)
- 1-[(2-bromophenyl)methyl]cyclobutan-1-ol (CAS 1540049-07-7)
- 4-(4-Ethoxy-2-methylphenyl)-3-fluorophenol (CAS 1261998-20-2)
- 1-(2,3,4,5-tetrahydro-1H-1,5-benzodiazepin-1-yl)ethan-1-one (CAS 80773-02-0)
- 4-[(Morpholinothio)thioxomethyl]morpholine (CAS 13752-51-7)
- 7-Chloro-5-methylthiazolo[4,5-d]pyrimidine (CAS 1550884-43-9)
- CE3F4 (CAS 143703-25-7)
- Cyclopeptide-5 (CAS 197172-76-2)
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