Vardenafil Impurity 18 CAS 68282-26-8
| CAS No. | 68282-26-8 |
| Molecular Formula | C10H17NO4 |
| Molecular Weight | 215.25 g/mol |
| Category | Pharmacopoeial Impurity Standards / EP Impurities |
| Availability | In Stock |
Chemical Structure
Description
As a certified reference material (CRM), Vardenafil Impurity 18 meets the metrological traceability requirements of ISO/IEC 17025 laboratories. Batch-to-batch consistency is monitored via control charts to guarantee comparable assigned values across lots.
Vardenafil Impurity 18 (CAS 68282-26-8) is a certified pharmaceutical impurity reference standard with the molecular formula C10H17NO4 and a molecular weight of 215.25 g/mol.
Structurally, Vardenafil Impurity 18 (C10H17NO4) contains an amino-acid-derived structure, an amide group, a hydroxyl group, an ether linkage. 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 215.25 g/mol, it falls into the medium-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.
Physical & Chemical Properties
| Molecular Formula | C10H17NO4 |
| Molecular Weight | 215.25 g/mol |
| Appearance | White to pale yellow crystalline powder. (faint amine-like odor) |
| Purity | >95% |
| Storage | Store at 2-8°C, protect from light, keep sealed and dry |
| Solubility (reference) | Soluble in methanol, ethanol, DMSO |
| Stability | May oxidize slowly on prolonged air exposure; Light-sensitive; avoid direct strong light; Hygroscopic; reseal immediately after opening |
| Degree of Unsaturation (DBE) | 3.0 |
| UV Absorption | UV-absorbing |
| CAS Registry Year (est.) | 1976 |
| Nitrogen Atoms | 1 |
Related Vardenafil Standards
- Vardenafil Impurity 4 (CAS 454426-80-3)
- Vardenafil Impurity 20 (CAS 879-57-2)
- Vardenafil Impurity 7 (CAS 53623-81-7)
- Vardenafil Impurity 8 (CAS 224789-20-2)
- Vardenafil Impurity 46 (CAS 1417529-59-9)
- Vardenafil Impurity 21 (Mixture of E/Z-Isomers) (CAS 68282-25-7)
- Vardenafil Impurity 51 (CAS CATO-C4X-101751)
- Vardenafil Impurity 52 (CAS 224789-22-4)
Recommended Standards
- tert-butyl (S)-(6-oxotetrahydro-2H-pyran-3-yl)carbamate (CAS 125982-23-2)
- Agomelatine Impurity 11 (CAS 138113-07-2)
- H-D-2-Nal-OH (CAS 76985-09-6)
- Brexpiprazole Impurity 137 (CAS 2050176-73-1)
- Doxorubicin Impurity 25 (CAS CATO-C4X-203325)
- Quetiapine EP Impurity K HCl (CAS 1371638-10-6(free base))
- Nifuratel Impurity 18 (CAS CATO-C4X-127218)
- Potassium (3-(tert-butoxycarbonyl)-3-azabicyclo[5.1.0]octan-1-yl)trifluoroborate (CAS 2489456-45-1)
- n-Butyl-N-ethylsulfamoyl chloride (CAS 926184-77-2)
- 4-Bromo-1,2,3,6,7,8-hexahydropyrene (CAS 1732-25-8)
- Bicalutamide Glucoronide (CAS 151262-59-8)
- Semduramicin (CAS 113378-31-7)
- Ethyl 2-amino-4-(4-chloro-3-methylphenyl)thiophene-3-carboxylate (CAS 899684-01-6)
- β-Bag Cell Peptide (Aplysia californica) (CAS 109024-47-7)
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